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  <channel>
    <title>topic Re: Access Token in Dropbox API Support &amp; Feedback</title>
    <link>https://www.dropboxforum.com/t5/Dropbox-API-Support-Feedback/Access-Token/m-p/190612#M8213</link>
    <description>&lt;P&gt;Are you using our &lt;A href="https://www.dropbox.com/developers/documentation/dotnet" target="_self"&gt;official .NET SDK&lt;/A&gt;? We recommend doing so. It comes with a &lt;A href="https://github.com/dropbox/dropbox-sdk-dotnet/tree/master/Examples/SimpleBlogDemo" target="_self"&gt;SimpleBlogDemo&lt;/A&gt;&amp;nbsp;example app that shows how to use &lt;A href="https://dropbox.github.io/dropbox-sdk-dotnet/html/T_Dropbox_Api_DropboxOAuth2Helper.htm" target="_self"&gt;DropboxOAuth2Helper&lt;/A&gt;&amp;nbsp;to process the app authorization flow.&lt;/P&gt;
&lt;P&gt;&amp;nbsp;&lt;/P&gt;
&lt;P&gt;Each user will get their own access token once they go through the app authorization flow. An access token identifies a particular app-user pair, so it will be different from your own access token.&lt;/P&gt;</description>
    <pubDate>Thu, 13 Oct 2016 17:56:48 GMT</pubDate>
    <dc:creator>Greg-DB</dc:creator>
    <dc:date>2016-10-13T17:56:48Z</dc:date>
    <item>
      <title>Access Token</title>
      <link>https://www.dropboxforum.com/t5/Dropbox-API-Support-Feedback/Access-Token/m-p/190306#M8190</link>
      <description>&lt;P&gt;Hello,&lt;BR /&gt;I would like to know if is possible a&amp;nbsp;person who is not developer get your token?&lt;/P&gt;&lt;P&gt;I ask this because I'm developing an app that can access to any account, for example, in my computer the app needs do access to my account (in the begin I select my account to access), if I pass this app to other person that isn't a developer, this person needs to be able to access your account (not my account) even isn't a developer(in the begin the person select your account to access).&lt;/P&gt;&lt;P&gt;&amp;nbsp;&lt;/P&gt;&lt;P&gt;Best Regards&lt;/P&gt;</description>
      <pubDate>Wed, 29 May 2019 09:29:29 GMT</pubDate>
      <guid>https://www.dropboxforum.com/t5/Dropbox-API-Support-Feedback/Access-Token/m-p/190306#M8190</guid>
      <dc:creator>knightd23</dc:creator>
      <dc:date>2019-05-29T09:29:29Z</dc:date>
    </item>
    <item>
      <title>Re: Access Token</title>
      <link>https://www.dropboxforum.com/t5/Dropbox-API-Support-Feedback/Access-Token/m-p/190376#M8197</link>
      <description>&lt;P&gt;Yes, using the OAuth app authorization flow, your app can have each user connect their own&amp;nbsp;Dropbox account. The OAuth guide here may be helpful:&lt;/P&gt;
&lt;P&gt;&amp;nbsp;&lt;/P&gt;
&lt;P&gt;&lt;A href="https://www.dropbox.com/developers/reference/oauth-guide" target="_blank"&gt;https://www.dropbox.com/developers/reference/oauth-guide&lt;/A&gt;&lt;/P&gt;
&lt;P&gt;&amp;nbsp;&lt;/P&gt;
&lt;P&gt;If you're using an official SDK, the tutorial/documentation will have information on implementing the OAuth app authorization flow.&lt;/P&gt;</description>
      <pubDate>Wed, 12 Oct 2016 17:16:43 GMT</pubDate>
      <guid>https://www.dropboxforum.com/t5/Dropbox-API-Support-Feedback/Access-Token/m-p/190376#M8197</guid>
      <dc:creator>Greg-DB</dc:creator>
      <dc:date>2016-10-12T17:16:43Z</dc:date>
    </item>
    <item>
      <title>Re: Access Token</title>
      <link>https://www.dropboxforum.com/t5/Dropbox-API-Support-Feedback/Access-Token/m-p/190379#M8198</link>
      <description>&lt;P&gt;Hello,&lt;/P&gt;&lt;P&gt;&amp;nbsp;&lt;/P&gt;&lt;P&gt;First of all, thanks for the answer.&lt;/P&gt;&lt;P&gt;I have already read the file that you say, but I continue to not understood in practice how to apply.&amp;nbsp;&lt;/P&gt;&lt;P&gt;What I understood untill now is that, to get the token the user need to be a developer. You said that is possible each user connect their own account, but how they can obtain the token if they aren't developers.&lt;/P&gt;&lt;P&gt;&amp;nbsp;&lt;/P&gt;&lt;P&gt;Best Regards&lt;/P&gt;</description>
      <pubDate>Wed, 12 Oct 2016 17:28:38 GMT</pubDate>
      <guid>https://www.dropboxforum.com/t5/Dropbox-API-Support-Feedback/Access-Token/m-p/190379#M8198</guid>
      <dc:creator>knightd23</dc:creator>
      <dc:date>2016-10-12T17:28:38Z</dc:date>
    </item>
    <item>
      <title>Re: Access Token</title>
      <link>https://www.dropboxforum.com/t5/Dropbox-API-Support-Feedback/Access-Token/m-p/190395#M8199</link>
      <description>Users don't need to be developers to get an access token for your app.&lt;BR /&gt;&lt;BR /&gt;What SDK/library are you using, if any? How you set this up depends on what you're using.</description>
      <pubDate>Wed, 12 Oct 2016 18:12:56 GMT</pubDate>
      <guid>https://www.dropboxforum.com/t5/Dropbox-API-Support-Feedback/Access-Token/m-p/190395#M8199</guid>
      <dc:creator>Greg-DB</dc:creator>
      <dc:date>2016-10-12T18:12:56Z</dc:date>
    </item>
    <item>
      <title>Re: Access Token</title>
      <link>https://www.dropboxforum.com/t5/Dropbox-API-Support-Feedback/Access-Token/m-p/190486#M8205</link>
      <description>&lt;P&gt;Hello,&lt;/P&gt;&lt;P&gt;&amp;nbsp;&lt;/P&gt;&lt;P&gt;Thanks for the answer.&lt;/P&gt;&lt;P&gt;You say that the users don't need to be developers to get an access token, how can they obtain this token? Or their token is the same that i'm using now in the tests?&lt;/P&gt;&lt;P&gt;I'm programming in C# (.NET) in the Visual Studio 2015. I'm new in the use of the OAuth/OAuth2, I just already read the documentation about this theme but I couldn't understood very well, hence my question.&lt;/P&gt;&lt;P&gt;&amp;nbsp;&lt;/P&gt;&lt;P&gt;Best Regards&lt;/P&gt;</description>
      <pubDate>Thu, 13 Oct 2016 08:16:48 GMT</pubDate>
      <guid>https://www.dropboxforum.com/t5/Dropbox-API-Support-Feedback/Access-Token/m-p/190486#M8205</guid>
      <dc:creator>knightd23</dc:creator>
      <dc:date>2016-10-13T08:16:48Z</dc:date>
    </item>
    <item>
      <title>Re: Access Token</title>
      <link>https://www.dropboxforum.com/t5/Dropbox-API-Support-Feedback/Access-Token/m-p/190612#M8213</link>
      <description>&lt;P&gt;Are you using our &lt;A href="https://www.dropbox.com/developers/documentation/dotnet" target="_self"&gt;official .NET SDK&lt;/A&gt;? We recommend doing so. It comes with a &lt;A href="https://github.com/dropbox/dropbox-sdk-dotnet/tree/master/Examples/SimpleBlogDemo" target="_self"&gt;SimpleBlogDemo&lt;/A&gt;&amp;nbsp;example app that shows how to use &lt;A href="https://dropbox.github.io/dropbox-sdk-dotnet/html/T_Dropbox_Api_DropboxOAuth2Helper.htm" target="_self"&gt;DropboxOAuth2Helper&lt;/A&gt;&amp;nbsp;to process the app authorization flow.&lt;/P&gt;
&lt;P&gt;&amp;nbsp;&lt;/P&gt;
&lt;P&gt;Each user will get their own access token once they go through the app authorization flow. An access token identifies a particular app-user pair, so it will be different from your own access token.&lt;/P&gt;</description>
      <pubDate>Thu, 13 Oct 2016 17:56:48 GMT</pubDate>
      <guid>https://www.dropboxforum.com/t5/Dropbox-API-Support-Feedback/Access-Token/m-p/190612#M8213</guid>
      <dc:creator>Greg-DB</dc:creator>
      <dc:date>2016-10-13T17:56:48Z</dc:date>
    </item>
    <item>
      <title>Re: Access Token</title>
      <link>https://www.dropboxforum.com/t5/Dropbox-API-Support-Feedback/Access-Token/m-p/190681#M8221</link>
      <description>&lt;P&gt;Hello,&lt;/P&gt;&lt;P&gt;&amp;nbsp;&lt;/P&gt;&lt;P&gt;Thanks for the answer.&lt;/P&gt;&lt;P&gt;In the Visual Studio I install in the "Package Manager Console" the .NET SDk like is in the website (PM&amp;gt; Install-Package Dropbox.Api).&amp;nbsp;This is what you&amp;nbsp;mean? Or there are other SDK diferent of visual studio that I need to install?&lt;/P&gt;&lt;P&gt;&amp;nbsp;&lt;/P&gt;&lt;P&gt;I tried to run the SimpleBlogDemo example but gives an error in the access to dropbox&amp;nbsp;(Server Error in '/' Application). I already changed the APP KEY and SECRET in the Web.config and add the http://localhost:5000/Home/Auth in the app console and not work. There are some think that I can do to correct this problem? &amp;nbsp;&lt;/P&gt;&lt;P&gt;&amp;nbsp;&lt;/P&gt;&lt;P&gt;Best Regards&lt;/P&gt;</description>
      <pubDate>Fri, 14 Oct 2016 09:08:18 GMT</pubDate>
      <guid>https://www.dropboxforum.com/t5/Dropbox-API-Support-Feedback/Access-Token/m-p/190681#M8221</guid>
      <dc:creator>knightd23</dc:creator>
      <dc:date>2016-10-14T09:08:18Z</dc:date>
    </item>
    <item>
      <title>Re: Access Token</title>
      <link>https://www.dropboxforum.com/t5/Dropbox-API-Support-Feedback/Access-Token/m-p/190723#M8231</link>
      <description>Yes, that's the official .NET SDK.&lt;BR /&gt;&lt;BR /&gt;What's the actual error you're getting on the backend of the sample app?</description>
      <pubDate>Fri, 14 Oct 2016 17:48:39 GMT</pubDate>
      <guid>https://www.dropboxforum.com/t5/Dropbox-API-Support-Feedback/Access-Token/m-p/190723#M8231</guid>
      <dc:creator>Greg-DB</dc:creator>
      <dc:date>2016-10-14T17:48:39Z</dc:date>
    </item>
    <item>
      <title>Re: Access Token</title>
      <link>https://www.dropboxforum.com/t5/Dropbox-API-Support-Feedback/Access-Token/m-p/190932#M8262</link>
      <description>&lt;P&gt;Hello,&lt;/P&gt;&lt;P&gt;Thanks for the answer.&lt;/P&gt;&lt;P&gt;The error &lt;SPAN&gt;appeared on a web page and is&amp;nbsp;&lt;/SPAN&gt;the following:&lt;/P&gt;&lt;P&gt;Server error in application&amp;nbsp;'/'.&lt;/P&gt;&lt;P&gt;Error Analyser&lt;/P&gt;&lt;P&gt;Description: &lt;SPAN&gt;Error parsing a resource required to make this request.&amp;nbsp;See the specific analysis error details below and modify your source file appropriately.&lt;/SPAN&gt;&lt;/P&gt;&lt;P&gt;&lt;SPAN&gt;Error message analyzer&lt;/SPAN&gt;: &lt;SPAN&gt;Could not load type&lt;/SPAN&gt; 'SimpleBusinessDashboard.MvcApplication'.&lt;/P&gt;&lt;P&gt;&lt;SPAN&gt;Source Error&lt;/SPAN&gt;:&lt;/P&gt;&lt;P&gt;&lt;BR /&gt;Line 1: &amp;lt;%@ Application Codebehind="Global.asax.cs" Inherits="SimpleBusinessDashboard.MvcApplication" Language="C#" %&amp;gt;&lt;/P&gt;&lt;P&gt;&lt;SPAN&gt;Source file&lt;/SPAN&gt;: /global.asax Linha: 1&lt;/P&gt;&lt;P&gt;Version Info: Microsoft .NET Framework version:4.0.30319; ASP.NET version:4.6.1586.0&lt;/P&gt;&lt;P&gt;&amp;nbsp;&lt;/P&gt;&lt;P&gt;How can resolve this?&lt;/P&gt;&lt;P&gt;&amp;nbsp;&lt;/P&gt;&lt;P&gt;Best Regards&lt;/P&gt;</description>
      <pubDate>Mon, 17 Oct 2016 08:32:52 GMT</pubDate>
      <guid>https://www.dropboxforum.com/t5/Dropbox-API-Support-Feedback/Access-Token/m-p/190932#M8262</guid>
      <dc:creator>knightd23</dc:creator>
      <dc:date>2016-10-17T08:32:52Z</dc:date>
    </item>
    <item>
      <title>Re: Access Token</title>
      <link>https://www.dropboxforum.com/t5/Dropbox-API-Support-Feedback/Access-Token/m-p/191038#M8289</link>
      <description>&lt;P&gt;We can't seem to reproduce that error. Did you follow &lt;A href="https://github.com/dropbox/dropbox-sdk-dotnet/tree/master/Examples/SimpleBlogDemo#setup" target="_self"&gt;the instructions for setting it up&lt;/A&gt;? (Also, I reccomended trying the &lt;A href="https://github.com/dropbox/dropbox-sdk-dotnet/tree/master/Examples/SimpleBlogDemo#setup" target="_self"&gt;SimpleBlogDemo&lt;/A&gt;, but it looks like you're trying to run the &lt;A href="https://github.com/dropbox/dropbox-sdk-dotnet/tree/master/Examples/SimpleBusinessDashboard#setup" target="_self"&gt;SimpleBusinessDashboard&lt;/A&gt;&amp;nbsp;sample.) If you can share steps to reproduce it, that would be helpful.&lt;/P&gt;
&lt;P&gt;&amp;nbsp;&lt;/P&gt;
&lt;P&gt;In any case, looking online, there seem to be &lt;A href="http://www.aspneto.com/parser-error-when-deploying-asp-net-application.html" target="_self"&gt;several things that can cause this&lt;/A&gt;. Can you take a look at those?&lt;/P&gt;</description>
      <pubDate>Mon, 17 Oct 2016 21:35:14 GMT</pubDate>
      <guid>https://www.dropboxforum.com/t5/Dropbox-API-Support-Feedback/Access-Token/m-p/191038#M8289</guid>
      <dc:creator>Greg-DB</dc:creator>
      <dc:date>2016-10-17T21:35:14Z</dc:date>
    </item>
    <item>
      <title>Re: Access Token</title>
      <link>https://www.dropboxforum.com/t5/Dropbox-API-Support-Feedback/Access-Token/m-p/191089#M8303</link>
      <description>&lt;P&gt;Hello,&amp;nbsp;&lt;/P&gt;&lt;P&gt;Thanks for the answer.&lt;/P&gt;&lt;P&gt;I leave then the steps that I follow:&lt;/P&gt;&lt;P&gt;-Open the project the&amp;nbsp;Dropbox.api with Visual Studio;&lt;/P&gt;&lt;P&gt;-Right click in SimpleBlogDemo -&amp;gt; Set as Startup Project&lt;/P&gt;&lt;P&gt;-Open Web.config file and add the APPKEY and APPSECRET to lines 21 and 22 respectively.&lt;/P&gt;&lt;P&gt;-Add in MY APPS Dropbox the&amp;nbsp;&lt;SPAN&gt;http://localhost:5000/Home/Auth in the&amp;nbsp;Redirect URIs of the&amp;nbsp;OAuth2&lt;/SPAN&gt;&lt;/P&gt;&lt;P&gt;- Save and press Start button&lt;/P&gt;&lt;P&gt;&amp;nbsp;&lt;/P&gt;&lt;P&gt;Sometimes gives the error that I described other times open a tab in the browser and after a while time said that is impossible to access to the website.&lt;/P&gt;&lt;P&gt;&amp;nbsp;&lt;/P&gt;&lt;P&gt;Best Regards&lt;/P&gt;</description>
      <pubDate>Tue, 18 Oct 2016 08:56:26 GMT</pubDate>
      <guid>https://www.dropboxforum.com/t5/Dropbox-API-Support-Feedback/Access-Token/m-p/191089#M8303</guid>
      <dc:creator>knightd23</dc:creator>
      <dc:date>2016-10-18T08:56:26Z</dc:date>
    </item>
    <item>
      <title>Re: Access Token</title>
      <link>https://www.dropboxforum.com/t5/Dropbox-API-Support-Feedback/Access-Token/m-p/191173#M8319</link>
      <description>Thanks! We have managed to reproduce this. It seems the different sample projects can conflict with each other in some cases.&lt;BR /&gt;&lt;BR /&gt;Please try the following to resolve it:&lt;BR /&gt;- right click on the SimpleBlogDemo project&lt;BR /&gt;- click "Properties"&lt;BR /&gt;- click "Web" in the sidebar&lt;BR /&gt;- change the port in "Project Url", e.g., from http://localhost:5000/ to http://localhost:5001/&lt;BR /&gt;- say yes the resulting pop-up, if you get one&lt;BR /&gt;- run the project again</description>
      <pubDate>Tue, 18 Oct 2016 21:02:27 GMT</pubDate>
      <guid>https://www.dropboxforum.com/t5/Dropbox-API-Support-Feedback/Access-Token/m-p/191173#M8319</guid>
      <dc:creator>Greg-DB</dc:creator>
      <dc:date>2016-10-18T21:02:27Z</dc:date>
    </item>
    <item>
      <title>Re: Access Token</title>
      <link>https://www.dropboxforum.com/t5/Dropbox-API-Support-Feedback/Access-Token/m-p/191199#M8325</link>
      <description>&lt;P&gt;Hello,&lt;/P&gt;&lt;P&gt;&amp;nbsp;&lt;/P&gt;&lt;P&gt;With your configurations the page opens, request a login register and after I give the permissions to my app allows the access to the simpleblogdemo, &amp;nbsp;the request the error "Server Error in '/' Application." reappears.&lt;/P&gt;&lt;P&gt;&amp;nbsp;&lt;/P&gt;&lt;P&gt;Best Regards&lt;/P&gt;</description>
      <pubDate>Wed, 19 Oct 2016 08:27:36 GMT</pubDate>
      <guid>https://www.dropboxforum.com/t5/Dropbox-API-Support-Feedback/Access-Token/m-p/191199#M8325</guid>
      <dc:creator>knightd23</dc:creator>
      <dc:date>2016-10-19T08:27:36Z</dc:date>
    </item>
    <item>
      <title>Re: Access Token</title>
      <link>https://www.dropboxforum.com/t5/Dropbox-API-Support-Feedback/Access-Token/m-p/191270#M8331</link>
      <description>I'm glad to hear that fixed that issue.&lt;BR /&gt;&lt;BR /&gt;Can you share the backend error you're getting for this new problem? Thanks in advance!</description>
      <pubDate>Wed, 19 Oct 2016 17:17:08 GMT</pubDate>
      <guid>https://www.dropboxforum.com/t5/Dropbox-API-Support-Feedback/Access-Token/m-p/191270#M8331</guid>
      <dc:creator>Greg-DB</dc:creator>
      <dc:date>2016-10-19T17:17:08Z</dc:date>
    </item>
    <item>
      <title>Re: Access Token</title>
      <link>https://www.dropboxforum.com/t5/Dropbox-API-Support-Feedback/Access-Token/m-p/191276#M8335</link>
      <description>&lt;P&gt;Also, make sure to update the redirect URI to match the new port.&amp;nbsp;&lt;/P&gt;
&lt;P&gt;&amp;nbsp;&lt;/P&gt;
&lt;P&gt;We've now&amp;nbsp;updated the repo in Github to have the two projects point to different ports now to avoid this in the future. Pulling the latest code should fix everything. If not (maybe due to cached files), Properties -&amp;gt; Web -&amp;gt; Create Virtual Directory should fix it.&lt;/P&gt;</description>
      <pubDate>Wed, 19 Oct 2016 17:51:16 GMT</pubDate>
      <guid>https://www.dropboxforum.com/t5/Dropbox-API-Support-Feedback/Access-Token/m-p/191276#M8335</guid>
      <dc:creator>Greg-DB</dc:creator>
      <dc:date>2016-10-19T17:51:16Z</dc:date>
    </item>
    <item>
      <title>Re: Access Token</title>
      <link>https://www.dropboxforum.com/t5/Dropbox-API-Support-Feedback/Access-Token/m-p/191355#M8357</link>
      <description>&lt;P&gt;Hello,&lt;/P&gt;&lt;P&gt;&amp;nbsp;&lt;/P&gt;&lt;P&gt;Thanks for the answer.&lt;/P&gt;&lt;P&gt;The error gives after I run the program and run the follow steps:&lt;/P&gt;&lt;P&gt;-Appear a web page when I run, that tells to signup now, I press that key&lt;/P&gt;&lt;P&gt;-Next ask to write my email account and password, I wrote;&lt;/P&gt;&lt;P&gt;-In the end has a button which name is "connected", I press this and gives the following error.&lt;/P&gt;&lt;P&gt;&amp;nbsp;&lt;/P&gt;&lt;P&gt;&amp;nbsp;&lt;/P&gt;&lt;P&gt;&amp;nbsp;&lt;/P&gt;&lt;P&gt;Server Error in '/' Application.&lt;/P&gt;&lt;HR /&gt;&lt;P&gt;&lt;I&gt;The value can't be null.&lt;BR /&gt;Parameter name: clientId&lt;/I&gt;&lt;/P&gt;&lt;P&gt;&lt;STRONG&gt;&lt;FONT face="Arial, Helvetica, Geneva, SunSans-Regular, sans-serif "&gt;Description&lt;/FONT&gt;&lt;/STRONG&gt;&lt;FONT face="Arial, Helvetica, Geneva, SunSans-Regular, sans-serif "&gt;&lt;STRONG&gt;: &lt;/STRONG&gt;Unhandled exception when running the current Web request. Please review the stack trace for more information about the error and the appropriate originated in the code.&lt;BR /&gt;&lt;BR /&gt;&lt;STRONG&gt;Exception Details: &lt;/STRONG&gt;System.ArgumentNullException: Value can not be null.&lt;BR /&gt;&lt;FONT face="Arial, Helvetica, Geneva, SunSans-Regular, sans-serif "&gt;Par&lt;FONT face="Arial, Helvetica, Geneva, SunSans-Regular, sans-serif "&gt;ameter name&lt;/FONT&gt;&lt;/FONT&gt;: clientId&lt;BR /&gt;&lt;BR /&gt;&lt;STRONG&gt;&lt;FONT face="Arial, Helvetica, Geneva, SunSans-Regular, sans-serif "&gt;Source error&lt;/FONT&gt;:&lt;/STRONG&gt;&lt;BR /&gt;&lt;BR /&gt;&lt;/FONT&gt;&lt;/P&gt;&lt;TABLE&gt;&lt;TBODY&gt;&lt;TR&gt;&lt;TD&gt;&lt;PRE&gt;Line 207:            if (string.IsNullOrWhiteSpace(clientId))
Line 208:            {
&lt;FONT color="red"&gt;Line 209:                throw new ArgumentNullException("clientId");&lt;/FONT&gt;Line 210:            }
Linha 211:            &lt;/PRE&gt;&lt;/TD&gt;&lt;/TR&gt;&lt;/TBODY&gt;&lt;/TABLE&gt;&lt;P&gt;&lt;FONT face="Arial, Helvetica, Geneva, SunSans-Regular, sans-serif "&gt;&lt;BR /&gt;&amp;nbsp; &lt;FONT face="Arial, Helvetica, Geneva, SunSans-Regular, sans-serif "&gt;Source File&lt;/FONT&gt;&lt;STRONG&gt;: &lt;/STRONG&gt;&lt;FONT face="Arial, Helvetica, Geneva, SunSans-Regular, sans-serif "&gt;......&lt;/FONT&gt;\dropbox-sdk-dotnet-master\Dropbox.Api\DropboxOauth2Helper.cs&lt;STRONG&gt; &amp;nbsp;&amp;nbsp; &lt;FONT face="Arial, Helvetica, Geneva, SunSans-Regular, sans-serif "&gt;Line&lt;/FONT&gt;: &lt;/STRONG&gt;209&lt;BR /&gt;&lt;BR /&gt;&lt;STRONG&gt;Stack Trace:&lt;/STRONG&gt;&lt;BR /&gt;&lt;BR /&gt;&lt;/FONT&gt;&lt;/P&gt;&lt;TABLE&gt;&lt;TBODY&gt;&lt;TR&gt;&lt;TD&gt;&lt;PRE&gt;[ArgumentNullException: O valor não pode ser nulo.
Nome do parâmetro: clientId]
   Dropbox.Api.DropboxOAuth2Helper.GetAuthorizeUri(OAuthResponseType oauthResponseType, String clientId, Uri redirectUri, String state, Boolean forceReapprove, Boolean disableSignup) in C:\Users\tsf\Documents\dropbox-sdk-dotnet-master\Dropbox.Api\DropboxOauth2Helper.cs:209
   Dropbox.Api.DropboxOAuth2Helper.GetAuthorizeUri(OAuthResponseType oauthResponseType, String clientId, String redirectUri, String state, Boolean forceReapprove, Boolean disableSignup) in C:\Users\tsf\Documents\dropbox-sdk-dotnet-master\Dropbox.Api\DropboxOauth2Helper.cs:181
   SimpleBlogDemo.Controllers.HomeController.Connect() in C:\Users\tsf\Documents\dropbox-sdk-dotnet-master\Examples\SimpleBlogDemo\Controllers\HomeController.cs:176
   lambda_method(Closure , ControllerBase , Object[] ) +61
   System.Web.Mvc.ActionMethodDispatcher.Execute(ControllerBase controller, Object[] parameters) +14
   System.Web.Mvc.ReflectedActionDescriptor.Execute(ControllerContext controllerContext, IDictionary`2 parameters) +166
   System.Web.Mvc.ControllerActionInvoker.InvokeActionMethod(ControllerContext controllerContext, ActionDescriptor actionDescriptor, IDictionary`2 parameters) +27
   System.Web.Mvc.Async.AsyncControllerActionInvoker.&amp;lt;BeginInvokeSynchronousActionMethod&amp;gt;b__39(IAsyncResult asyncResult, ActionInvocation innerInvokeState) +22
   System.Web.Mvc.Async.WrappedAsyncResult`2.CallEndDelegate(IAsyncResult asyncResult) +29
   System.Web.Mvc.Async.WrappedAsyncResultBase`1.End() +49
   System.Web.Mvc.Async.AsyncControllerActionInvoker.EndInvokeActionMethod(IAsyncResult asyncResult) +32
   System.Web.Mvc.Async.AsyncInvocationWithFilters.&amp;lt;InvokeActionMethodFilterAsynchronouslyRecursive&amp;gt;b__3d() +50
   System.Web.Mvc.Async.&amp;lt;&amp;gt;c__DisplayClass46.&amp;lt;InvokeActionMethodFilterAsynchronouslyRecursive&amp;gt;b__3f() +225
   System.Web.Mvc.Async.&amp;lt;&amp;gt;c__DisplayClass33.&amp;lt;BeginInvokeActionMethodWithFilters&amp;gt;b__32(IAsyncResult asyncResult) +10
   System.Web.Mvc.Async.WrappedAsyncResult`1.CallEndDelegate(IAsyncResult asyncResult) +10
   System.Web.Mvc.Async.WrappedAsyncResultBase`1.End() +49
   System.Web.Mvc.Async.AsyncControllerActionInvoker.EndInvokeActionMethodWithFilters(IAsyncResult asyncResult) +34
   System.Web.Mvc.Async.&amp;lt;&amp;gt;c__DisplayClass2b.&amp;lt;BeginInvokeAction&amp;gt;b__1c() +26
   System.Web.Mvc.Async.&amp;lt;&amp;gt;c__DisplayClass21.&amp;lt;BeginInvokeAction&amp;gt;b__1e(IAsyncResult asyncResult) +100
   System.Web.Mvc.Async.WrappedAsyncResult`1.CallEndDelegate(IAsyncResult asyncResult) +10
   System.Web.Mvc.Async.WrappedAsyncResultBase`1.End() +49
   System.Web.Mvc.Async.AsyncControllerActionInvoker.EndInvokeAction(IAsyncResult asyncResult) +27
   System.Web.Mvc.Controller.&amp;lt;BeginExecuteCore&amp;gt;b__1d(IAsyncResult asyncResult, ExecuteCoreState innerState) +13
   System.Web.Mvc.Async.WrappedAsyncVoid`1.CallEndDelegate(IAsyncResult asyncResult) +29
   System.Web.Mvc.Async.WrappedAsyncResultBase`1.End() +49
   System.Web.Mvc.Controller.EndExecuteCore(IAsyncResult asyncResult) +36
   System.Web.Mvc.Controller.&amp;lt;BeginExecute&amp;gt;b__15(IAsyncResult asyncResult, Controller controller) +12
   System.Web.Mvc.Async.WrappedAsyncVoid`1.CallEndDelegate(IAsyncResult asyncResult) +22
   System.Web.Mvc.Async.WrappedAsyncResultBase`1.End() +49
   System.Web.Mvc.Controller.EndExecute(IAsyncResult asyncResult) +26
   System.Web.Mvc.Controller.System.Web.Mvc.Async.IAsyncController.EndExecute(IAsyncResult asyncResult) +10
   System.Web.Mvc.MvcHandler.&amp;lt;BeginProcessRequest&amp;gt;b__5(IAsyncResult asyncResult, ProcessRequestState innerState) +21
   System.Web.Mvc.Async.WrappedAsyncVoid`1.CallEndDelegate(IAsyncResult asyncResult) +29
   System.Web.Mvc.Async.WrappedAsyncResultBase`1.End() +49
   System.Web.Mvc.MvcHandler.EndProcessRequest(IAsyncResult asyncResult) +28
   System.Web.Mvc.MvcHandler.System.Web.IHttpAsyncHandler.EndProcessRequest(IAsyncResult result) +9
   System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +9765121
   System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean&amp;amp; completedSynchronously) +155&lt;/PRE&gt;&lt;/TD&gt;&lt;/TR&gt;&lt;/TBODY&gt;&lt;/TABLE&gt;</description>
      <pubDate>Thu, 20 Oct 2016 08:41:14 GMT</pubDate>
      <guid>https://www.dropboxforum.com/t5/Dropbox-API-Support-Feedback/Access-Token/m-p/191355#M8357</guid>
      <dc:creator>knightd23</dc:creator>
      <dc:date>2016-10-20T08:41:14Z</dc:date>
    </item>
    <item>
      <title>Re: Access Token</title>
      <link>https://www.dropboxforum.com/t5/Dropbox-API-Support-Feedback/Access-Token/m-p/191429#M8367</link>
      <description>Thanks! That error indicates that the app key is missing. Make sure you filled in the DropboxAppKey and DropboxAppSecret  values in Web.config for that sample app.</description>
      <pubDate>Thu, 20 Oct 2016 17:49:39 GMT</pubDate>
      <guid>https://www.dropboxforum.com/t5/Dropbox-API-Support-Feedback/Access-Token/m-p/191429#M8367</guid>
      <dc:creator>Greg-DB</dc:creator>
      <dc:date>2016-10-20T17:49:39Z</dc:date>
    </item>
    <item>
      <title>Re: Access Token</title>
      <link>https://www.dropboxforum.com/t5/Dropbox-API-Support-Feedback/Access-Token/m-p/191490#M8382</link>
      <description>&lt;P&gt;Hello,&lt;/P&gt;&lt;P&gt;&amp;nbsp;&lt;/P&gt;&lt;P&gt;Thanks for the anser.&lt;/P&gt;&lt;P&gt;I really forget to add the APPkey and Secret, that's because I download the last version and not added these values.&lt;/P&gt;&lt;P&gt;I having test the example now and it works good, however after I add files to my blog and if I delete these files in my dropbox, when i'm going to disconnect in the app gives the following error. I'm saying this because can be a problem to someone that need to do this, for me this isn't a problem.&lt;/P&gt;&lt;P&gt;&amp;nbsp;&lt;/P&gt;&lt;P&gt;Server Error in '/' Application.&lt;/P&gt;&lt;HR /&gt;&lt;P&gt;&lt;I&gt;The collection was modified; Enumeration operation may not be performed.&lt;/I&gt;&lt;/P&gt;&lt;P&gt;&lt;STRONG&gt;&lt;FONT face="Arial, Helvetica, Geneva, SunSans-Regular, sans-serif "&gt;Description&lt;/FONT&gt;&lt;/STRONG&gt;&lt;FONT face="Arial, Helvetica, Geneva, SunSans-Regular, sans-serif "&gt;&lt;STRONG&gt;: &lt;/STRONG&gt;E&lt;FONT face="Arial, Helvetica, Geneva, SunSans-Regular, sans-serif "&gt;ception un&lt;FONT face="Arial, Helvetica, Geneva, SunSans-Regular, sans-serif "&gt;handle&lt;FONT face="Arial, Helvetica, Geneva, SunSans-Regular, sans-serif "&gt;d when running the current Web request. Please review the stack trace for mor&lt;FONT face="Arial, Helvetica, Geneva, SunSans-Regular, sans-serif "&gt;e information about the &lt;FONT face="Arial, Helvetica, Geneva, SunSans-Regular, sans-serif "&gt;erro&lt;FONT face="Arial, Helvetica, Geneva, SunSans-Regular, sans-serif "&gt;r and the appropri&lt;FONT face="Arial, Helvetica, Geneva, SunSans-Regular, sans-serif "&gt;ate &lt;FONT face="Arial, Helvetica, Geneva, SunSans-Regular, sans-serif "&gt;source in &lt;FONT face="Arial, Helvetica, Geneva, SunSans-Regular, sans-serif "&gt;the code.&lt;/FONT&gt;&lt;/FONT&gt;&lt;/FONT&gt;&lt;/FONT&gt;&lt;/FONT&gt;&lt;/FONT&gt;&lt;/FONT&gt;&lt;/FONT&gt;&lt;/FONT&gt;&lt;BR /&gt;&lt;STRONG&gt;&lt;FONT face="Arial, Helvetica, Geneva, SunSans-Regular, sans-serif "&gt;Exception Details&lt;/FONT&gt;: &lt;/STRONG&gt;System.InvalidOperationException: The collection was modified&lt;FONT face="Arial, Helvetica, Geneva, SunSans-Regular, sans-serif "&gt;; enumeration operation may &lt;FONT face="Arial, Helvetica, Geneva, SunSans-Regular, sans-serif "&gt;not be &lt;FONT face="Arial, Helvetica, Geneva, SunSans-Regular, sans-serif "&gt;performed.&lt;/FONT&gt;&lt;/FONT&gt;&lt;/FONT&gt;&lt;BR /&gt;&lt;BR /&gt;&lt;STRONG&gt;&lt;FONT face="Arial, Helvetica, Geneva, SunSans-Regular, sans-serif "&gt;Source error&lt;/FONT&gt;:&lt;/STRONG&gt;&lt;BR /&gt;&lt;BR /&gt;&lt;/FONT&gt;&lt;/P&gt;&lt;TABLE&gt;&lt;TBODY&gt;&lt;TR&gt;&lt;TD&gt;&lt;PRE&gt;Line 82:                            select k;
Line 83: 
&lt;FONT color="red"&gt;Line 84:                 foreach (var key in keys)&lt;/FONT&gt;Line 85:                 {
Line 86:                     ArticleCache.Remove(key);&lt;/PRE&gt;&lt;/TD&gt;&lt;/TR&gt;&lt;/TBODY&gt;&lt;/TABLE&gt;&lt;P&gt;&lt;FONT face="Arial, Helvetica, Geneva, SunSans-Regular, sans-serif "&gt;&lt;BR /&gt;&lt;STRONG&gt;&lt;FONT face="Arial, Helvetica, Geneva, SunSans-Regular, sans-serif "&gt;Source File&lt;/FONT&gt;: &lt;/STRONG&gt;&lt;FONT face="Arial, Helvetica, Geneva, SunSans-Regular, sans-serif "&gt;.....&lt;/FONT&gt;\dropbox-sdk-dotnet-master\Examples\SimpleBlogDemo\Helpers\BlogHelpers.cs&lt;STRONG&gt; &amp;nbsp;&amp;nbsp; Lin&lt;FONT face="Arial, Helvetica, Geneva, SunSans-Regular, sans-serif "&gt;e&lt;/FONT&gt;: &lt;/STRONG&gt;84&lt;BR /&gt;&lt;BR /&gt;&lt;STRONG&gt;&lt;FONT face="Arial, Helvetica, Geneva, SunSans-Regular, sans-serif "&gt;Stack &lt;FONT face="Arial, Helvetica, Geneva, SunSans-Regular, sans-serif "&gt;Trace&lt;/FONT&gt;&lt;/FONT&gt;:&lt;/STRONG&gt;&lt;BR /&gt;&lt;BR /&gt;&lt;/FONT&gt;&lt;/P&gt;&lt;TABLE&gt;&lt;TBODY&gt;&lt;TR&gt;&lt;TD&gt;&lt;PRE&gt;[InvalidOperationException: The collection was modified; The enumeration operation may be not performed.]
   System.ThrowHelper.ThrowInvalidOperationException(ExceptionResource resource) +52
   System.Collections.Generic.Enumerator.MoveNext() +12384225
   System.Linq.WhereEnumerableIterator`1.MoveNext() +32
   SimpleBlogDemo.Helpers.BlogHelpers.FlushCache(ControllerBase controller, String blogName) in ....\dropbox-sdk-dotnet-master\Examples\SimpleBlogDemo\Helpers\BlogHelpers.cs:84
   SimpleBlogDemo.Controllers.&amp;lt;DisconnectAsync&amp;gt;d__10.MoveNext() in C:\Users\tsf\Documents\dropbox-sdk-dotnet-master\Examples\SimpleBlogDemo\Controllers\HomeController.cs:154
   System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) +92
   System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) +58
   System.Web.Mvc.Async.TaskAsyncActionDescriptor.EndExecute(IAsyncResult asyncResult) +97
   System.Web.Mvc.Async.&amp;lt;&amp;gt;c__DisplayClass37.&amp;lt;BeginInvokeAsynchronousActionMethod&amp;gt;b__36(IAsyncResult asyncResult) +17
   System.Web.Mvc.Async.WrappedAsyncResult`1.CallEndDelegate(IAsyncResult asyncResult) +10
   System.Web.Mvc.Async.WrappedAsyncResultBase`1.End() +48
   System.Web.Mvc.Async.AsyncControllerActionInvoker.EndInvokeActionMethod(IAsyncResult asyncResult) +32
   System.Web.Mvc.Async.AsyncInvocationWithFilters.&amp;lt;InvokeActionMethodFilterAsynchronouslyRecursive&amp;gt;b__3d() +50
   System.Web.Mvc.Async.&amp;lt;&amp;gt;c__DisplayClass46.&amp;lt;InvokeActionMethodFilterAsynchronouslyRecursive&amp;gt;b__3f() +225
   System.Web.Mvc.Async.&amp;lt;&amp;gt;c__DisplayClass33.&amp;lt;BeginInvokeActionMethodWithFilters&amp;gt;b__32(IAsyncResult asyncResult) +10
   System.Web.Mvc.Async.WrappedAsyncResult`1.CallEndDelegate(IAsyncResult asyncResult) +10
   System.Web.Mvc.Async.WrappedAsyncResultBase`1.End() +48
   System.Web.Mvc.Async.AsyncControllerActionInvoker.EndInvokeActionMethodWithFilters(IAsyncResult asyncResult) +34
   System.Web.Mvc.Async.&amp;lt;&amp;gt;c__DisplayClass2b.&amp;lt;BeginInvokeAction&amp;gt;b__1c() +26
   System.Web.Mvc.Async.&amp;lt;&amp;gt;c__DisplayClass21.&amp;lt;BeginInvokeAction&amp;gt;b__1e(IAsyncResult asyncResult) +100
   System.Web.Mvc.Async.WrappedAsyncResult`1.CallEndDelegate(IAsyncResult asyncResult) +10
   System.Web.Mvc.Async.WrappedAsyncResultBase`1.End() +48
   System.Web.Mvc.Async.AsyncControllerActionInvoker.EndInvokeAction(IAsyncResult asyncResult) +27
   System.Web.Mvc.Controller.&amp;lt;BeginExecuteCore&amp;gt;b__1d(IAsyncResult asyncResult, ExecuteCoreState innerState) +13
   System.Web.Mvc.Async.WrappedAsyncVoid`1.CallEndDelegate(IAsyncResult asyncResult) +29
   System.Web.Mvc.Async.WrappedAsyncResultBase`1.End() +48
   System.Web.Mvc.Controller.EndExecuteCore(IAsyncResult asyncResult) +36
   System.Web.Mvc.Controller.&amp;lt;BeginExecute&amp;gt;b__15(IAsyncResult asyncResult, Controller controller) +12
   System.Web.Mvc.Async.WrappedAsyncVoid`1.CallEndDelegate(IAsyncResult asyncResult) +22
   System.Web.Mvc.Async.WrappedAsyncResultBase`1.End() +48
   System.Web.Mvc.Controller.EndExecute(IAsyncResult asyncResult) +26
   System.Web.Mvc.Controller.System.Web.Mvc.Async.IAsyncController.EndExecute(IAsyncResult asyncResult) +10
   System.Web.Mvc.MvcHandler.&amp;lt;BeginProcessRequest&amp;gt;b__5(IAsyncResult asyncResult, ProcessRequestState innerState) +21
   System.Web.Mvc.Async.WrappedAsyncVoid`1.CallEndDelegate(IAsyncResult asyncResult) +29
   System.Web.Mvc.Async.WrappedAsyncResultBase`1.End() +48
   System.Web.Mvc.MvcHandler.EndProcessRequest(IAsyncResult asyncResult) +28
   System.Web.Mvc.MvcHandler.System.Web.IHttpAsyncHandler.EndProcessRequest(IAsyncResult result) +9
   System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +9765121
   System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean&amp;amp; completedSynchronously) +155&lt;/PRE&gt;&lt;/TD&gt;&lt;/TR&gt;&lt;/TBODY&gt;&lt;/TABLE&gt;</description>
      <pubDate>Fri, 21 Oct 2016 09:45:16 GMT</pubDate>
      <guid>https://www.dropboxforum.com/t5/Dropbox-API-Support-Feedback/Access-Token/m-p/191490#M8382</guid>
      <dc:creator>knightd23</dc:creator>
      <dc:date>2016-10-21T09:45:16Z</dc:date>
    </item>
    <item>
      <title>Re: Access Token</title>
      <link>https://www.dropboxforum.com/t5/Dropbox-API-Support-Feedback/Access-Token/m-p/191491#M8383</link>
      <description>&lt;P&gt;&amp;nbsp;&lt;/P&gt;&lt;P&gt;Hello,&lt;/P&gt;&lt;P&gt;&amp;nbsp;&lt;/P&gt;&lt;P&gt;You are right, I forgot to add the APPKEY and Secret in the xml file, because I think I was working with a old folder, however I was working with the new folder that you upload.&lt;/P&gt;&lt;P&gt;&amp;nbsp;&lt;/P&gt;&lt;P&gt;Other question, when I run the SimpleTest application gives the following error after ask to reset the settings. How can I solve? I already have looking for the URL configuration and I not found.&lt;/P&gt;&lt;P&gt;&amp;nbsp;&lt;/P&gt;&lt;P&gt;Best Regards&lt;/P&gt;&lt;P&gt;&amp;nbsp;&lt;/P&gt;&lt;P&gt;Dropbox - 400&lt;/P&gt;&lt;DIV&gt;Error (400)It seems the app you were using submitted a bad request. If you would like to report this error to the app's developer, include the information below.&lt;BR /&gt;&lt;BR /&gt;&lt;BR /&gt;&lt;DIV class="orange-hotbox"&gt;More details for developers&lt;P&gt;Invalid redirect_uri: "https://localhost/authorize": It must exactly match one of the redirect URIs you've pre-configured for your app (including the path).&lt;/P&gt;&lt;/DIV&gt;&lt;/DIV&gt;&lt;P&gt;&amp;nbsp;&lt;/P&gt;</description>
      <pubDate>Fri, 21 Oct 2016 09:56:13 GMT</pubDate>
      <guid>https://www.dropboxforum.com/t5/Dropbox-API-Support-Feedback/Access-Token/m-p/191491#M8383</guid>
      <dc:creator>knightd23</dc:creator>
      <dc:date>2016-10-21T09:56:13Z</dc:date>
    </item>
    <item>
      <title>Re: Access Token</title>
      <link>https://www.dropboxforum.com/t5/Dropbox-API-Support-Feedback/Access-Token/m-p/191573#M8400</link>
      <description>For that sample, you should add "https://localhost/authorize" as a redirect URI for your app on the App Console:&lt;BR /&gt;&lt;BR /&gt;&lt;A href="https://www.dropbox.com/developers/apps" target="_blank"&gt;https://www.dropbox.com/developers/apps&lt;/A&gt;</description>
      <pubDate>Fri, 21 Oct 2016 18:10:47 GMT</pubDate>
      <guid>https://www.dropboxforum.com/t5/Dropbox-API-Support-Feedback/Access-Token/m-p/191573#M8400</guid>
      <dc:creator>Greg-DB</dc:creator>
      <dc:date>2016-10-21T18:10:47Z</dc:date>
    </item>
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