Cannot get thumbails from GetThumbnailAsync

[Cross-linking for reference: https://stackoverflow.com/questions/35743478/how-to-get-thumbnails-for-image-dropbox-sdk-c-sharp ]

Here's a simple example that works for me to save a thumbnail of a file in Dropbox at "/test.jpg" to a local file on my computer:

public async Task GetThumbnail(string path)
{
 using (var response = await client.Files.GetThumbnailAsync(path, null, ThumbnailSize.W64h64.Instance))
 {
 using (var fileStream = File.Create ("/destination/path/test_thumb.jpg")) {
 var thumbStream = await response.GetContentAsStreamAsync();
 thumbStream.CopyTo (fileStream);
 };
 }
}

await GetThumbnail("/test.jpg");

Just be sure to set your remote path and local destination accordingly.