Check to see if the Guid object is null.
Guid guid = Guid.NewGuid();
if (quid == null)
{
}
To convert it to a string (passing paramneters to the ToString() method causes the returned value to formatted in specific ways see here:
http://msdn.microsoft.com/en-us/library/97af8hh4.aspx[
^]):
string myGuid = guid.ToString();
To convert a string to a guid:
Guid guid = new Guid(myguidstring);
If you had googled it, you would have found this:
http://msdn.microsoft.com/en-us/library/system.guid.aspx[
^]
All it takes is a little initiative and common sense to save yourself buttloads of time waiting for someone to answer your question.