using System;

using System.Linq.Expressions;

using FastExpressionCompiler;

​

public class Program

{

    public static void Main()

    {

        TestString();

    }

    public static void TestString()

    {

        var param = Expression.Parameter(typeof(Test), "x");

        var predicate = Expression.Lambda<Func<Test, bool>>(

            Expression.Equal(

                Expression.Modulo(

                    Expression.Property(param, "Id"),

                    Expression.Constant(2, typeof(int))

                ),

                Expression.Constant(0, typeof(int))

            ),

            param

        );

        // build

        var fn = predicate.Compile();

        var ffn = predicate.CompileFast<Func<Test, bool>>();

        if (ffn == null)

        {

            Console.WriteLine("ERROR: ffn is null even though we used default false as parameter...it should've fall back to Expression.Compile()");

            return;

        }

        // test

        var entity = new Test();

        var fnRes = fn(entity);

        var ffnRes = ffn(entity);

        Console.WriteLine("TestString(): OK!");

    }

​

    public class Test

    {

        public int Id { get; set; }

        public string Name { get; set; }

        public Test()

        {

            Id = 1;

        }

    }

}

​