Add FishNet network library

Assets/FishNet/CodeGenerating/Extension/ILProcessorExtensions.cs

@@ -0,0 +1,25 @@
+using FishNet.CodeGenerating.Helping.Extension;
+using MonoFN.Cecil;
+using MonoFN.Cecil.Cil;
+
+namespace FishNet.CodeGenerating.Extension
+{
+    internal static class ILProcessorExtensions
+    {
+        /// <summary>
+        /// Creates a variable type within the body and returns it's VariableDef.
+        /// </summary>
+        internal static VariableDefinition CreateVariable(this ILProcessor processor, CodegenSession session, System.Type variableType)
+        {
+            return processor.Body.Method.CreateVariable(session, variableType);
+        }
+
+        /// <summary>
+        /// Creates a variable type within the body and returns it's VariableDef.
+        /// </summary>
+        internal static VariableDefinition CreateVariable(this ILProcessor processor, CodegenSession session, TypeReference variableTr)
+        {
+            return processor.Body.Method.CreateVariable(variableTr);
+        }
+    }
+}