C# --Pass Value by Reference

pass_by_reference.cs

// Pass By Reference
using System;
namespace PassByValue
{
	public class Program
	{
	// Update – try to modify the values of the arguments passed to it; note that you can declare      
             // functions in any order in a class

public static void Update(int I, double d)
{
	i = 10;
	d = 20.0;
}
public static void Main(string[] args)
{
// declare two variables and initialize them
int I = 1;
double d = 2.0;
Console.Write(“Before the call to Update(int, double):”);
Console.Write(“I = “ + I + “, d =” + d);
// invoke function
Update(ref i, out  d);
// notice that the vales 1 and 2.0 have not changed
Console.WriteLine(“After the call to Update(int, double);”);
Console.WriteLine(“i = “ + I + “, d = “ + d);
// wait for user to acknowledge
Console.WriteLine(“Press Enter to terminate…”);
Console.Read();
}}}

Output:
Before the call to Update(int, double):
I = 1, d is not intialized
After the call to Update(int. double):
I = 10, d = 20
Press enter to terminate…