On the controller Put is as following:
[HttpPut]
[ActionName("putname")]
public JsonResult putname(string name)
{
    var response = ...
    return Json(response);  
}
The issue is on the when consuming this API via following
using (httpClient = new HttpClient())
{
    string name = "abc";
    string jsonString = JsonConvert.SerializeObject(name);
    var requestUrl = new Uri("http:...../controller/putname/");
    using (HttpContent httpContent = new StringContent(jsonString))
    {
        httpContent.Headers.ContentType = new MediaTypeHeaderValue("application/json");
        HttpResponseMessage response = httpClient.PutAsync(requestUrl, httpContent).Result;
    }
This code doesn't pass the parameter name to controller. I even tried changeing uri to /putname/" + name.
For me it worked correctly:
            string requestUrl = endpointUri + "/Files/";
            var jsonString = JsonConvert.SerializeObject(new { name = "newFile.txt", type = "File" }); 
            HttpContent httpContent = new StringContent(jsonString);
            httpContent.Headers.ContentType = new System.Net.Http.Headers.MediaTypeHeaderValue ("application/json");          
            HttpClient hc = new HttpClient();
            //add the header with the access token
            hc.DefaultRequestHeaders.Authorization = new System.Net.Http.Headers.AuthenticationHeaderValue("Bearer", accessToken);
            //make the put request
            HttpResponseMessage hrm = (await hc.PostAsync(requestUrl, httpContent));
            if (hrm.IsSuccessStatusCode)
            {
               //stuff
            }
                        Here is what works for me:
var jsonString = "{\"appid\":1,\"platformid\":1,\"rating\":3}";
var httpContent = new StringContent(jsonString, Encoding.UTF8, "application/json");            
var message = await _client.PutAsync(MakeUri("App/Rate"), httpContent);
Assert.AreEqual(HttpStatusCode.NoContent, message.StatusCode);
and my action method:
public void PutRate(AppRating model)
{
   if (model == null)
      throw new HttpResponseException(HttpStatusCode.BadRequest);
   if (ModelState.IsValid)
   {
     // ..
   }      
}
and the model
public class AppRating
{
    public int AppId { get; set; }
    public int PlatformId { get; set; }
    public decimal Rating { get; set; }
} 
-Stan
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