Whats the use of Nullable.GetUnderlyingType, if typeof(int?) is an Int32?

Question

why is typeof int? an Int32

int? x = 1;
Console.WriteLine(x.GetType().Name);

If it is okay then what\'s the use of

Answer 1

Its for when you don't know its Int32.

Example:

    public Type GetNullableUnderlyingType(Nullable obj) 
        where T : struct
    {
        return Nullable.GetUnderlyingType(typeof(Nullable));
    }

Here, you can pass any Nullable object and get it to return it's underlying type.