using System;

using System.Linq.Expressions;

using AgileObjects.ReadableExpressions;

public class Program

{

    public class EntityBase { }

​

    public class DerivedEntity : EntityBase

    {

        public bool Remove(DerivedEntity derived)

        {

            return derived != null;

        }

    }

    public static void Main()

    {

        var parentEntity = Expression.Parameter(typeof(EntityBase), "parentEntity");

        var entityExpression = Expression.Parameter(typeof(EntityBase), "entity");

​

        var sourceLambda = Expression.Lambda<Func<EntityBase, EntityBase, bool>>(

            Expression.Call(

                Expression.Convert(parentEntity, typeof(DerivedEntity)),

                typeof(DerivedEntity).GetMethod("Remove"),

                Expression.Convert(parentEntity, typeof(DerivedEntity))),

            parentEntity,

            entityExpression);

​

        Console.WriteLine(sourceLambda.ToReadableString());

    }

}