diff --git a/wrapper/CSharp/README.md b/wrapper/CSharp/README.md
index ea70e4bde..d19adbc25 100644
--- a/wrapper/CSharp/README.md
+++ b/wrapper/CSharp/README.md
@@ -45,7 +45,7 @@ sudo make install
 ```
 cd wrapper/CSharp
 
-msc wolfSSL_CSharp/wolfSSL.cs wolfSSL_CSharp/X509.cs \
+mcs wolfSSL_CSharp/wolfSSL.cs wolfSSL_CSharp/X509.cs \
     wolfSSL-TLS-Server/wolfSSL-TLS-Server.cs
 ```
 
diff --git a/wrapper/CSharp/wolfSSL_CSharp/wolfSSL.cs b/wrapper/CSharp/wolfSSL_CSharp/wolfSSL.cs
index c59c3e00b..e64781438 100644
--- a/wrapper/CSharp/wolfSSL_CSharp/wolfSSL.cs
+++ b/wrapper/CSharp/wolfSSL_CSharp/wolfSSL.cs
@@ -290,6 +290,17 @@ namespace wolfSSL.CSharp {
         [DllImport(wolfssl_dll, CallingConvention = CallingConvention.Cdecl)]
         private extern static int wolfSSL_CTX_use_psk_identity_hint(IntPtr ctx, StringBuilder identity);
 
+        /********************************
+         * SNI
+         */
+        [UnmanagedFunctionPointer(CallingConvention.Cdecl)]
+        public delegate int sni_delegate(IntPtr ssl, IntPtr ret, IntPtr exArg);
+        [DllImport(wolfssl_dll, CallingConvention = CallingConvention.Cdecl)]
+        private extern static void wolfSSL_CTX_set_servername_callback(IntPtr ctx, sni_delegate sni_cb);
+        [DllImport(wolfssl_dll, CallingConvention = CallingConvention.Cdecl)]
+        private extern static void wolfSSL_CTX_set_tlsext_servername_callback(IntPtr ctx, sni_delegate sni_cb);
+        [DllImport(wolfssl_dll, CallingConvention = CallingConvention.Cdecl)]
+        private extern static void wolfSSL_CTX_set_servername_arg(IntPtr ctx, IntPtr arg);
 
         /********************************
          * SSL Structure