Added support for running C# code in a dotnet core environment

environments/dotnet/Function.cs

@@ -0,0 +1,21 @@
+using System;
+using System.Reflection;
+using System.Collections.Generic;
+
+namespace Fission.DotNetCore.Compiler
+{
+    class Function
+    {
+        private readonly MethodInfo _info;
+        public Function(MethodInfo info)
+        {
+            if (info == null) throw new ArgumentNullException(nameof(info));
+            _info = info;
+        }
+
+        public object Invoke(Dictionary<string, object> args)
+        {
+            return _info.Invoke(null, new[] { args });
+        }
+    }
+}