Csharp/CSharp Tutorial/struct/struct copy

Copy a struct.

using System; 
 
struct MyStruct { 
  public int x; 
} 
 
class MainClass { 
  public static void Main() { 
    MyStruct a; 
    MyStruct b; 
 
    a.x = 10; 
    b.x = 20; 
 
    Console.WriteLine("a.x {0}, b.x {1}", a.x, b.x); 
 
    a = b; 
    b.x = 30; 
 
    Console.WriteLine("a.x {0}, b.x {1}", a.x, b.x); 
  } 
}

a.x 10, b.x 20
a.x 20, b.x 30

Copy a struct instance by assignment

using System;
    public struct Point
    {
        public int x;
        public int y;
        public Point( int x, int y )
        {
            this.x = x;
            this.y = y;
        }
        public void Print()
        {
            System.Console.WriteLine( "x = {0}, y = {1}", x, y );
        }
    }
    class MainClass
    {
        static void Main(string[] args)
        {
            Point p = new Point( 3, 4 );
            Point q = p;    // takes a copy
            q.x = 5;        // only changes q not p
            p.Print();      // so we still see x = 3, y = 4
        }
    }

x = 3, y = 4