using System;

public class Program

{

    public void Main(string[] args)                 

    {                   

​

        //CheckClass t = new CheckClass();                  

        //t.Print();                    

    }

}

​

public class CheckClass                 

{                   

    public static int CheckValue;                   

    public CheckClass()                 

    {                   

        if (CheckValue == 0)                    

        {                   

            CheckValue = 5;                 

        }                   

    }                   

    static CheckClass()                 

    {                   

        if (CheckValue == 0)                    

        {                   

            CheckValue = 10;                    

        }                   

    }                   

    public void Print()                 

    {                   

        if (CheckValue == 5)                    

        {                   

            CheckValue = 6;                                 

        }                   

        Console.WriteLine("CheckValue : " + CheckValue);                    

    }                   

}                   

​