remove s3directory change

Author: GarrettBeatty

sdk/src/Services/S3/Custom/Transfer/Internal/DownloadDirectoryCommand.cs

@@ -196,7 +196,7 @@ private void ValidateRequest()
                 throw new InvalidOperationException("The LocalDirectory Specified is null or empty!");
             }
 
-            if (File.Exists(this._request.LocalDirectory))
+            if (File.Exists(this._request.S3Directory))
             {
                 throw new InvalidOperationException("A file already exists with the same name indicated by LocalDirectory!");
             }

sdk/test/Services/S3/UnitTests/Custom/DownloadDirectoryCommandTests.cs

@@ -173,32 +173,6 @@ public async Task ExecuteAsync_WithMissingLocalDirectory_ThrowsInvalidOperationE
             await command.ExecuteAsync(CancellationToken.None);
         }
 
-        [TestMethod]
-        [ExpectedException(typeof(InvalidOperationException))]
-        public async Task ExecuteAsync_WithFileExistingAtLocalDirectoryPath_ThrowsInvalidOperationException()
-        {
-            // Arrange - Create a file with the same name as the local directory
-            var testFilePath = Path.Combine(Path.GetTempPath(), $"test-file-{Guid.NewGuid()}.tmp");
-            File.WriteAllText(testFilePath, "test");
-            
-            try
-            {
-                var request = CreateDownloadDirectoryRequest(localDirectory: testFilePath);
-                var command = new DownloadDirectoryCommand(_mockS3Client.Object, request, _config, useMultipartDownload: false);
-
-                // Act - This should throw InvalidOperationException, not NullReferenceException
-                await command.ExecuteAsync(CancellationToken.None);
-            }
-            finally
-            {
-                // Cleanup
-                if (File.Exists(testFilePath))
-                {
-                    File.Delete(testFilePath);
-                }
-            }
-        }
-
         #endregion
 
         #region ExecuteAsync Tests - Empty Directory