typeof(T) vs. Object.GetType() performance

Question

Is anyone aware of any differences between typeof(T) where T : struct, for example, vs. t.GetType() where t is a System.Object?
ILdasm shows t

Answer 1

Well, sometimes in generic code, you know the compile time type from a type parameter T, without having an instance. Then you must use typeof(T).

At other times, typically in non generic code, you might be interested in the runtime type of an object. Then you use GetType().

So in some cases, depending on what you want to know, or what you can query for, you only have one option.

And sometimes, you could choose.