feat: introduce NoContentException (#131)

src/Pipedrive.net/Exceptions/NoContentException.cs

@@ -0,0 +1,37 @@
+using System;
+using System.Diagnostics;
+using System.Net;
+
+namespace Pipedrive
+{
+    /// <summary>
+    /// Represents a HTTP 204 - No content response returned from the API.
+    /// </summary>
+    public class NoContentException : ApiException
+    {
+        /// <summary>
+        /// Constructs an instance of NoContentException
+        /// </summary>
+        /// <param name="response">The HTTP payload from the server</param>
+        public NoContentException(IResponse response) : this(response, null)
+        {
+        }
+
+        /// <summary>
+        /// Constructs an instance of NoContentException
+        /// </summary>
+        /// <param name="response">The HTTP payload from the server</param>
+        /// <param name="innerException">The inner exception</param>
+        public NoContentException(IResponse response, Exception innerException)
+            : base(response, innerException)
+        {
+            Debug.Assert(response != null && response.StatusCode == HttpStatusCode.NoContent,
+                "NoContentException created with wrong status code");
+        }
+
+        public override string Message
+        {
+            get { return ApiErrorMessageSafe ?? "No content"; }
+        }
+    }
+}

src/Pipedrive.net/Http/Connection.cs

@@ -455,7 +455,8 @@ async Task<IResponse> RunRequest(IRequest request, CancellationToken cancellatio
                 { (HttpStatusCode)422, response => new ApiValidationException(response) },
                 { (HttpStatusCode)429, response => new TooManyRequestsException(response) },
                 { HttpStatusCode.InternalServerError, response => new InternalServerErrorException(response) },
-                { HttpStatusCode.NotImplemented, response => new NotImplementedException(response) }
+                { HttpStatusCode.NotImplemented, response => new NotImplementedException(response) },
+                { HttpStatusCode.NoContent, response => new NoContentException(response) }
             };
 
         static void HandleErrors(IResponse response)