// C# Eval Expression

// Doc: https://eval-expression.net/options

​

// @nuget: Z.Expressions.Eval

​

/*

## DisableDynamicResolution

​

The DisableDynamicResolution option lets you get or sets if built-in logic should be disabled when solving expression of type `object`. That built-in logic allows you to compile some C# code that would be invalid. By default, the DisableDynamicResolution value is false.

​

In this example, we will first add two `int` values by casting them as type `object`, which is an invalid C# statement but works in this case due to our built-in logic. Then we will try again by disabling that option which will now correctly throw an error.

​

See more: https://eval-expression.net/options

*/

​

using System;

using System.Collections.Generic;

using Z.Expressions;

​

public class Program

{

    public static void Main()

    {

        // Global Context: EvalManager.DefaultContext.DisableDynamicResolution = true;

​

        var context = new EvalContext();    

​

        var r1 = context.Execute<int>("(object)1 + (object)2");

        Console.WriteLine("1 - Result: " + r1);

        try

        {

            context.DisableDynamicResolution = true;

            var fail = context.Execute<int>("(object)1 + (object)2");

        }

        catch (Exception ex)

        {

            Console.WriteLine("2 - Exception: " + ex.Message);

        }

    }

}