Add filename_override upload parameter

Author: RTLcoil

Shared.IntegrationTests/UploadApi/UploadMethodsTest.cs

@@ -975,6 +975,24 @@ public void TestEvalUploadParameter()
             Assert.IsInstanceOf<double>(uploadResult.QualityAnalysis.Focus);
         }
 
+        [Test, RetryWithDelay]
+        public void TestUploadFilenameOverride()
+        {
+            const string filenameOverride = "test_overridden";
+
+            var uploadParams = new ImageUploadParams()
+            {
+                File = new FileDescription(m_testImagePath),
+                Tags = m_apiTag,
+                FilenameOverride = filenameOverride
+            };
+
+            var uploadResult = m_cloudinary.Upload(uploadParams);
+
+            Assert.IsNotNull(uploadResult);
+            Assert.AreEqual(filenameOverride, uploadResult.OriginalFilename);
+        }
+
         //[Test, RetryWithDelay]
         //public void TestTextAlign()
         //{

Shared/Actions/AssetsUpload/BasicRawUploadParams.cs

@@ -37,6 +37,11 @@ public virtual ResourceType ResourceType
             get { return Actions.ResourceType.Raw; }
         }
 
+        /// <summary>
+        /// Gets or sets file name to override an original file name.
+        /// </summary>
+        public string FilenameOverride { get; set; }
+
         /// <summary>
         /// Validate object model.
         /// </summary>
@@ -64,10 +69,11 @@ public override void Check()
         /// <returns>Sorted dictionary of parameters.</returns>
         public override SortedDictionary<string, object> ToParamsDictionary()
         {
-            SortedDictionary<string, object> dict = base.ToParamsDictionary();
+            var dict = base.ToParamsDictionary();
 
             AddParam(dict, "public_id", PublicId);
             AddParam(dict, "type", Type);
+            AddParam(dict, "filename_override", FilenameOverride);
 
             if (Backup.HasValue)
             {