referenceTypeMethodPassing.cs

using System;
public class Student{

	public string StudentName { get; set; }
	public string Course { get; set; }
}

public class Program
{
	public static void UpdateCourse(Student std2)
	{
		std2.Course   = "Computer Science";
	}
	
	public static void Main()
	{
		Student std1 = new Student();
		
		std1.StudentName = "Bill";
		std1.Course= "Not Eligible";
		
		Console.WriteLine("Course: "+std1.Course);
		
		UpdateCourse(std1);
		Console.WriteLine("Course Updated");
		Console.WriteLine("Course: "+std1.Course);
	}
}

/*
Course: Not Eligible
Course Updated
Course: Computer Science
*/