diff --git a/csharp/src/Microsoft.ML.OnnxRuntime/InferenceSession.cs b/csharp/src/Microsoft.ML.OnnxRuntime/InferenceSession.cs
index bcf680fbe4..fd5133534b 100644
--- a/csharp/src/Microsoft.ML.OnnxRuntime/InferenceSession.cs
+++ b/csharp/src/Microsoft.ML.OnnxRuntime/InferenceSession.cs
@@ -137,15 +137,15 @@ namespace Microsoft.ML.OnnxRuntime
             var inputTensors = new IntPtr[inputs.Count];
             var pinnedBufferHandles = new System.Buffers.MemoryHandle[inputs.Count];
 
-            int offset = 0;
+            int inputIndex = 0;
             foreach (var input in inputs)
             {
-                inputNames[offset] = input.Name;
+                inputNames[inputIndex] = input.Name;
 
                 // create Tensor from the input if feasible, else throw notsupported exception for now
-                input.ToNativeOnnxValue(out inputTensors[offset], out pinnedBufferHandles[offset]);
+                input.ToNativeOnnxValue(out inputTensors[inputIndex], out pinnedBufferHandles[inputIndex]);
 
-                offset++;
+                inputIndex++;
             }
 
             string[] outputNamesArray = outputNames.ToArray();
diff --git a/csharp/src/Microsoft.ML.OnnxRuntime/SessionOptions.cs b/csharp/src/Microsoft.ML.OnnxRuntime/SessionOptions.cs
index 9aded53148..c5d36c6a05 100644
--- a/csharp/src/Microsoft.ML.OnnxRuntime/SessionOptions.cs
+++ b/csharp/src/Microsoft.ML.OnnxRuntime/SessionOptions.cs
@@ -7,17 +7,6 @@ using System.Runtime.InteropServices;
 
 namespace Microsoft.ML.OnnxRuntime
 {
-    /// <summary>
-    /// Various providers of ONNX operators
-    /// </summary>
-    public enum ExecutionProvider
-    {
-        Cpu,
-        MklDnn,
-        Cuda
-        //TODO: add more providers gradually
-    };
-
     /// <summary>
     /// Holds the options for creating an InferenceSession
     /// </summary>
@@ -56,7 +45,7 @@ namespace Microsoft.ML.OnnxRuntime
         /// </param>
         public void EnableSequentialExecution()
         {
-                NativeMethods.OrtEnableSequentialExecution(_nativePtr);
+            NativeMethods.OrtEnableSequentialExecution(_nativePtr);
         }
 
         /// <summary>
diff --git a/docs/CSharp_API.md b/docs/CSharp_API.md
index 97976ae921..af9d889390 100644
--- a/docs/CSharp_API.md
+++ b/docs/CSharp_API.md
@@ -117,15 +117,6 @@ Enable Sequential Execution. By default, it is enabled.
     DisableSequentialExecution();
 Disable Sequential Execution and enable Parallel Execution.
 
-    AppendExecutionProvider(ExecutionProvider provider);
-Appends execution provider to the session. For any operator in the graph the first execution provider that implements the operator will be user. ExecutionProvider is defined as the following enum.
-
-    enum ExecutionProvider
-    {
-        Cpu,
-        MklDnn
-    }
-
 ### NodeMetadata
 Container of metadata for a model graph node, used for communicating the shape and type of the input and output nodes.