// Entity Framework Classic

// Doc: https://entityframework-classic.net/csharp-eval-expression

​

// @nuget: Z.EntityFramework.Classic

​

​

using System;

using System.Collections.Generic;

using System.Dynamic;

using Z.Expressions;

​

public class Program

{

    public static void Main()

    {

        // Parameter: Anonymous Type

        int result = Eval.Execute<int>("X + Y", new { X = 1, Y = 2} );

        Console.WriteLine(result);

        // Parameter: Argument Position

        result = Eval.Execute<int>("{0} + {1}", 1, 2);

        Console.WriteLine(result);

        // Parameter: Class Member

        dynamic expandoObject = new ExpandoObject();

        expandoObject.X = 1;

        expandoObject.Y = 2;

        result = Eval.Execute<int>("X + Y", expandoObject);

        Console.WriteLine(result);

        // Parameter: Dictionary Key

        var values = new Dictionary<string, object>() { {"X", 1}, {"Y", 2} };

        result = Eval.Execute<int>("X + Y", values);

        Console.WriteLine(result);

    }

}