Uploading issue , Please any one help me .

I am beginner in API Devlopment.
I am trying to upload images, document & files etc. on dropbox through V2 Rest Api method but falied.

Here is my Code
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var client = new RestSharp.RestClient("https://content.dropboxapi.com/2/files/upload");
var request = new RestRequest(Method.POST);
request.AddHeader("Dropbox-API-Arg", "{\"path\":\"/Medical Records/"+fileName+"\",\"mode\":{\".tag\":\"overwrite\"}}");
request.AddHeader("Content-Type", "application/octet-stream");

request.AddHeader("Authorization", "Bearer <AccessToken>");
request.AddFile("file", Server.MapPath("~/Content/60.jpg"), "image/jpg");

request.Timeout = System.Threading.Timeout.Infinite;

IRestResponse response = client.Execute(request);


After execution of above code getting this Error:
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Error in call to API function "files/upload": Bad HTTP "Content-Type" header: "multipart/form-data; boundary=-----------------------------28947758029299".  Expecting one of "application/octet-stream", "text/plain; charset=dropbox-cors-hack".