How to declare a constant Guid in C#?
No. The const modifier only applies to "primitive" types (bool, int, float, double, long, decimal, short, byte) and strings. Basically anything you can declare as a literal.
Declare it as static readonly Guid rather than const Guid
public static readonly Guid Users = new Guid("5C60F693-BEF5-E011-A485-80EE7300C695");
and that's that.