add csrc and mmdeploy module

csrc/mmdeploy/apis/csharp/MMDeploy/APIs/DisposableObject.cs

+using System;
+using System.Runtime.InteropServices;
+
+namespace MMDeploy
+{
+    /// <summary>
+    /// Base class which manages its own memory.
+    /// </summary>
+    public class DisposableObject : IDisposable
+    {
+#pragma warning disable SA1401 // Fields should be private
+        /// <summary>
+        /// Handle pointer.
+        /// </summary>
+        protected IntPtr _handle;
+#pragma warning restore SA1401 // Fields should be private
+
+        private bool _disposed = false;
+
+        /// <summary>
+        /// Gets a value indicating whether this instance has been disposed.
+        /// </summary>
+        public void Dispose()
+        {
+            Dispose(true);
+            GC.SuppressFinalize(this);
+        }
+
+        /// <summary>
+        /// Close handle.
+        /// </summary>
+        public void Close()
+        {
+            Dispose();
+        }
+
+        /// <summary>
+        /// Releases the resources.
+        /// </summary>
+        private void Dispose(bool disposing)
+        {
+            if (_disposed)
+            {
+                return;
+            }
+
+            if (disposing)
+            {
+                // Free any other managed objects here.
+                ReleaseManaged();
+            }
+
+            // Free any unmanaged objects here.
+            ReleaseHandle();
+
+            _handle = IntPtr.Zero;
+
+            _disposed = true;
+        }
+
+        /// <summary>
+        /// Releases managed resources.
+        /// </summary>
+        protected virtual void ReleaseManaged()
+        {
+        }
+
+        /// <summary>
+        /// Releases unmanaged resources.
+        /// </summary>
+        protected virtual void ReleaseHandle()
+        {
+            Marshal.FreeHGlobal(_handle);
+        }
+
+        /// <summary>
+        /// Finalizes an instance of the <see cref="DisposableObject"/> class.
+        /// </summary>
+        ~DisposableObject()
+        {
+            Dispose(false);
+        }
+
+        /// <summary>
+        /// Throw exception is result is not zero.
+        /// </summary>
+        /// <param name="result">function return value.</param>
+        protected static void ThrowException(int result)
+        {
+            if (result != 0)
+            {
+                throw new Exception(result.ToString());
+            }
+        }
+
+        /// <summary>
+        /// Gets internal handle.
+        /// </summary>
+        /// <param name="obj">instance.</param>
+        public static implicit operator IntPtr(DisposableObject obj) => obj._handle;
+    }
+}

csrc/mmdeploy/apis/csharp/MMDeploy/MMDeployCSharp.props

+<Project ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+	<PropertyGroup>
+		<MMDeployNativeDlls>$(MSBuildThisFileDirectory)..\..\runtimes</MMDeployNativeDlls>
+	</PropertyGroup>
+	<ItemGroup Condition="$(TargetFrameworkVersion.StartsWith('v4')) Or $(TargetFramework.StartsWith('net4'))">
+		<Content Include="$(MMDeployNativeDlls)\win-x64\native\mmdeploy.dll">
+			<Link>mmdeploy.dll</Link>
+			<CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
+		</Content>
+	</ItemGroup>
+</Project>