using System;

private class Program

{

    public static void Main()

    {

                TestStatic t = new TestStatic();

        t.Print();

    }

}

​

public class TestStatic

{

        public static int TestValue;

        public TestStatic()

        {

            if (TestValue == 0)

            {

                    TestValue = 5;

            }

        }

        static TestStatic()

        {

            if (TestValue == 0)

            {

                    TestValue = 10;

            }

        }

        public void Print()

        {

            if (TestValue == 5)

            {

                    TestValue = 6;

            }

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

        }

}

​

​