PostRequest.cs

public static string PostRequest(Uri serviceReqUrl, string jsonData, Dictionary<string, string> additionalHeaders, out System.Net.HttpStatusCode statusCode)
		{
			HttpResponseMessage response = null;
			try
			{
				using (HttpClient client = new HttpClient())
				{
					HttpContent content = new System.Net.Http.StringContent(jsonData, System.Text.Encoding.UTF8, "application/json");
					if (additionalHeaders != null)
					{
						foreach (var k in additionalHeaders.Keys)
						{
							string val = string.Empty;
							additionalHeaders.TryGetValue(k, out val);
							client.DefaultRequestHeaders.Add(k, val);
						}
					}
					response = client.PostAsync(serviceReqUrl, content).Result;
					statusCode = response.StatusCode;
					return response.Content.ReadAsStringAsync().Result;
				}
			}
			catch (HttpRequestException e)
			{
				Trace.TraceError(string.Format("PostRequest failed.  Request URL = {0}, Response Status Code = {1}", serviceReqUrl, (int)response.StatusCode));
				Trace.TraceError(e.StackTrace);
				throw e;
			}
		}
		
		public static string PostRequest(Uri serviceReqUrl, string jsonData, Dictionary<string, string> additionalHeaders = null)
		{
			HttpResponseMessage response = null;
			try
			{
				using (HttpClient client = new HttpClient())
				{
					HttpContent content = new System.Net.Http.StringContent(jsonData, System.Text.Encoding.UTF8, "application/json");
					if (additionalHeaders != null)
					{
						foreach (var k in additionalHeaders.Keys)
						{
							string val = string.Empty;
							additionalHeaders.TryGetValue(k, out val);
							client.DefaultRequestHeaders.Add(k, val);
						}
					}
					response = client.PostAsync(serviceReqUrl, content).Result;
					response.EnsureSuccessStatusCode();
					return response.Content.ReadAsStringAsync().Result;
				}
			}
			catch (HttpRequestException e)
			{
				Trace.TraceError(string.Format("PostRequest failed.  Request URL = {0}, Response Status Code = {1}", serviceReqUrl, (int)response.StatusCode));
				Trace.TraceError(e.StackTrace);
				throw e;
			}
		}