What is the difference between myCustomer.GetType() and typeof(Customer) in C#?

Question

I\'ve seen both done in some code I\'m maintaining, but don\'t know the difference. Is there one?

let me add that myCustomer is an instance of Customer

Answer 1

The typeof operator takes a type as a parameter. It is resolved at compile time. The GetType method is invoked on an object and is resolved at run time. The first is used when you need to use a known Type, the second is to get the type of an object when you don't know what it is.

class BaseClass
{ }

class DerivedClass : BaseClass
{ }

class FinalClass
{
    static void RevealType(BaseClass baseCla)
    {
        Console.WriteLine(typeof(BaseClass));  // compile time
        Console.WriteLine(baseCla.GetType());  // run time
    }

    static void Main(string[] str)
    {
        RevealType(new BaseClass());

        Console.ReadLine();
    }
}
// *********  By Praveen Kumar Srivastava