Csus4

using System;
using System.Diagnostics;
using System.Linq.Expressions;

using Db4objects.Db4o.Linq.Expressions;

class Test
{

    static void Main()
    {
        Expression<Action> a = () => Debug.Write(1);
        Expression<Action> b = () => Debug.Write(1);
        Expression<Action> c = () => Debug.Write(2);
        Expression<Action> d = () => a.Compile();

        Func<Expression, Expression, bool> eq =
            ExpressionEqualityComparer.Instance.Equals;

        Console.WriteLine(eq(a, b));                                          //true
        Console.WriteLine(eq(a, c));                                          //false
        Console.WriteLine(eq(a, d));                                          //false 
        Console.WriteLine(eq(a, (Expression<Action>)(() => Debug.Write(1)))); //true
        Console.ReadKey();
    }
}