C#类型转换

隐式转换
显示转换：
string val = "123";
int myInt = (int) val;
或者
myInt= Convert.ToInt32(val);
Convert.ToInt16   short
Convert.ToInt32   Int
Convert.ToInt64   long
Convert.ToUInt16   Ushort
Convert.ToUInt32   UInt
Convert.ToUInt64   Ulong
Convert.ToString   string
Convert.ToSingle   float
...........
枚举类型使用方法
enum MyWeekDay : int
              {aMonday = 1,
                aTuesday = 2,
                aWendesday =3}
             MyWeekday myweek = MyWeekday.aMonday;