LambdasUsingLocals.cs

using System;

public static class Program {
    public static void Main (string[] args) {
        int x = 1;
        string y = "y";

        Func<string> a = () => {
            return String.Format("x={0}, y={1}", x, y);
        };
        Func<int, string> b = (z) => {
            return String.Format("x={0}, y={1}, z={2}", x, y, z);
        };

        Console.WriteLine("a()={0} b()={1}", a(), b(3));
    }
}

LambdasUsingLocals.js

// go0jc5pf, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null
JSIL.DeclareNamespace(this, "Program");
JSIL.MakeClass(System.Object, Program, "$lt$gtc__DisplayClass2", "Program/<>c__DisplayClass2");


Program.Main = function (args) {
	var $lt$gtc__DisplayClass = null;
	$lt$gtc__DisplayClass = new Program.$lt$gtc__DisplayClass2();
	$lt$gtc__DisplayClass.x = 1;
	$lt$gtc__DisplayClass.y = "y";
	System.Console.WriteLine(
		"a()={0} b()={1}", 
		(function () {
				return System.String.Format("x={0}, y={1}", $lt$gtc__DisplayClass.x, $lt$gtc__DisplayClass.y);
			})(), 
		(function (z) {
				return System.String.Format("x={0}, y={1}, z={2}", $lt$gtc__DisplayClass.x, $lt$gtc__DisplayClass.y, z);
			})(3)
	);
};

Program.$lt$gtc__DisplayClass2.prototype.x = 0;
Program.$lt$gtc__DisplayClass2.prototype.y = null;
Program.$lt$gtc__DisplayClass2.prototype._ctor = function () {
	System.Object.prototype._ctor.call(this);
};


timeout(30); Program.Main([]);