using System;

using System.Linq;

using System.Linq.Expressions;

using System.Collections.Generic;

public class Program

{

    public static void Main()

    {

        var gameObjects = new List<GameObject> {

            new GameObject { X = 0, Y = 0, GameObjectType = GameObjectType.WindMill },

            new GameObject { X = 0, Y = 1, GameObjectType = GameObjectType.Pipe },

            new GameObject { X = 0, Y = 2, GameObjectType = GameObjectType.Factory }

        };

​

        var gameObjectsQueryable = gameObjects.AsQueryable();

​

        Expression<Func<GameObject, bool>> expression = t => t.X == 0 && t.Y == 0 && t.GameObjectType == GameObjectType.WindMill;

​

        var result = gameObjectsQueryable.Where(expression);

​

        var resultAsList = result.ToList();

​

        foreach (var item in resultAsList)

        {

            Console.WriteLine(item);

        }

​

        //Obtain the t.GameObjectType == GameObjectType.WindMill part

        var binaryExpression = expression.Body as BinaryExpression;

        var right = binaryExpression.Right;

        var binaryExpression2 = right as BinaryExpression;

        var right2 = binaryExpression2.Right;

​

        if (right2 is UnaryExpression)

        {

            Console.WriteLine("Found UnaryExpression (This happens when the solution is build with VS2015)...");

​

            var right2Unary = binaryExpression2.Right as UnaryExpression;

            var right2Constant = right2Unary.Operand as ConstantExpression;

            CheckIfConsantIsAsExpected(right2Constant);

        }

        else

        {

            Console.WriteLine("Found ConstantExpression (This happens when the solution is build with VS2015 Update 1)...");

​

            var right2Constant = binaryExpression2.Right as ConstantExpression;

            CheckIfConsantIsAsExpected(right2Constant);

        }

    }

    public static void CheckIfConsantIsAsExpected(ConstantExpression expression)

    {

        if (expression.Value.Equals(GameObjectType.WindMill))

        {

            Console.WriteLine("The value is the enum we expected :), : "+expression.Value);

        }

        else

        {

            Console.WriteLine("The value is not the enum we expected :(, : "+expression.Value);

        }

    }

}

​

public class GameObject

{

    public int X { get; set; }

    public int Y { get; set; }

    public GameObjectType GameObjectType { get; set; }

​

    public override string ToString()

    {

        return X+","+Y+": "+GameObjectType;

    }

}

​

public enum GameObjectType

{

    WindMill = 100,

    Pipe = 200,

    Factory = 300

}