// C# Eval Expression

// Doc: https://eval-expression.net/my-first-option

​

// @nuget: Z.Expressions.Eval

​

/*

## Use Option to Add Method

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In the C# Eval Expression library, you can add your own method.

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If you can define the method in a non-dynamic way, you should always prefer to [register your method](/register-unregister) instead of creating it dynamically. Registered methods are faster and more secure.

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In this first example, we’ll create a simple custom method called `MinPlusOne` that returns the minimum value between two numbers and adds one:

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https://dotnetfiddle.net/4VXupA

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In this second example, we go one step further. We’ll create a more advanced method dynamically, where the logic (formula) is provided by the user. This is useful when you want to inject a user-defined expression directly into a method.

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https://dotnetfiddle.net/ZlZjx4

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See more: https://eval-expression.net/my-first-option

*/

​

using System;

using System.Collections.Generic;

using Z.Expressions;

​

public class Program

{

    public static void Main()

    {

        var evalContext = new EvalContext();    

        evalContext.AddMethod(@"

public int MinPlusOne(int A, int B)

{

    return (A < B ? A : B) + 1;

}

");

​

        var result = evalContext.Execute<int>("MinPlusOne(Value1, Value2)", new { Value1 = 1, Value2 = 99 });

        Console.WriteLine(result); 

    }

}