Why isn't there a Guid.IsNullOrEmpty() method

Question

This keeps me wondering why Guid in .NET does not have IsNullOrEmpty() method (where empty means all zeros)

I need this at several places in my ASP.NET

Answer 1

As others have pointed out, the premise of the question isn't all there. C# Guid is not nullable. However, Guid? is. A clean way of checking if a Guid? is null or Guid.Empty is by check if the result of GetValueOrDefault() is Guid.Empty. E.g.,

Guid? id;

// some logic sets id

if (Guid.Empty.Equals(guid.GetValueOrDefault()))
{
    // Do something
}