static void DoWithSomeType(object obj)
{
//SecondType secondType = (SecondType)obj;
SecondType secondType = obj as SecondType;
if (secondType != null)
{
// do someting
}
}
static void Main(string[] args)
{
FirstType firstType = new FirstType()
{
Name = "First Type"
};
SecondType secondType = (SecondType)firstType; //转型成功
//secondType = firstType as SecondType; //编译期转型失败，编译不通过
Console.Read();
}