How can I create an optional DateTime parameter?

Question

I have this function that returns a reference type. Now, this function has two optional parameters both of which are instances of the DateTime class. The function i

Answer 1

Btw, you don't have to use nullable datetime like all other answers says. You can do it with DateTime as well:

public DateTime GetDate(
     DateTime start = default(DateTime), 
     DateTime end = default(DateTime))
{
     start = start == default(DateTime) ? DateTime.MinValue : start;
     end = end == default(DateTime) ? DateTime.MinValue : end;
}

This is unlikely but it won't work as expected if you actually pass the default datetime value to your function.