using System;

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​

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public class Student{

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    public string StudentName { get; set; }

}

​

public class Program

{

    public static void ChangeReferenceType(Student std2)

    {

        std2.StudentName   = "Steve";

    }

    public static void Main()

    {

        Student std1 = new Student();

        std1.StudentName = "Bill";

        ChangeReferenceType(std1);

        Console.WriteLine(std1.StudentName);

    }

}

​