ASP.Net
Its easy to make GUIDs in ASP.Net. Using Visual Basic or C#. Below is clean code to get GUIDs. When the .Net CRL creates GUIDs or UUIDs they are version 4 guids. When the .Net CRL creates GUIDs or UUIDs they are version 4 guids. Where a '4' begins the third group of digits.
VB (Visual Basic)
Dim String myGuid = Guid.NewGuid().ToString()
C# (C Sharp)
string myGuid = Guid.NewGuid().ToString();
