public static void addtoamount(this money money, decimal amountToAdd)
{
money.Amount += amountToAdd;
// r//eturn true;
}
static void Main(string[] args)
{
/*
* phoencustomer mycus = new phoencustomer();
* phonecusstruct mycusstruct = new phonecusstruct();
* mycus.firstname = "simon";
* mycus.lastname = "jack";
* mycus.custmerid = 1999;
* mycusstruct.lastname = "mark";
* Console.WriteLine(mycusstruct.lastname);
* Console.WriteLine(mycus.firstname+" "+mycus.lastname);
* Console.WriteLine(mycus.custmerid);
*
* Console.WriteLine("π的值为 " + MathTest.GetPi());
* int x = MathTest.GetSquareOf(5);
* Console.WriteLine("5的平方是 " + x);
* MathTest math = new MathTest();
* math.Value = 30;
* Console.WriteLine("新的value值为 " + math.Value);
* Console.WriteLine("30的平方为 " + math.GetSquare());
* int cd=0;
* int i = 0,y=0;
* int[] ints = { 0, 1, 2, 4, 8 };
* Console.WriteLine("i=" + i);
* Console.WriteLine("ints[0]=" + ints[0]);
* Console.WriteLine("calling somefun.");
* somefun(ints,y, ref cd, out i);
* Console.WriteLine("i=" + i);
* Console.WriteLine("ints[0]=" + ints[0]+" "+cd+" "+y);
*
* fullname("jhon", "Doe");
* Console.WriteLine();*/
Console.WriteLine(DateTime.MaxValue);
Console.WriteLine();
Console.WriteLine("userp:backcolor is " + userp.backcolor.ToString());
//弱引用
/* WeakReference mathref = new WeakReference(new MathTest());
* MathTest math;
* if(mathref.IsAlive)
* {
* math=mathref.Target as MathTest;
* math.Value = 30;
* Console.WriteLine("value field of math....." + math.Value);
* Console.WriteLine("square of 30 id " + math.GetSquare());
* }
* else
* {
* Console.WriteLine("ref is nor available");
* }
* GC.Collect();
* if(mathref.IsAlive)
* {
* math= mathref.Target as MathTest;
* }
* else
* {
* Console.WriteLine("not available");
* }
*/
//弱引用结束
money cash = new money();
cash.Amount = 40M;
Console.WriteLine("cash1 " + cash.ToString());
cash.addtoamount(40M);
Console.WriteLine(cash.ToString());
Console.ReadLine();
}
