C#: Check if a string is a valid GUID

***NOTE*** After a lot of constructive criticism from my fellow blog-posters (and I really do appreciate it all), I am questioning my own post about its effectiveness over something simple like this (which was not unknown though). Please read all the comments for your education if you care to:

public bool CheckGuid(string guidString)
{
try
{
Guid g = new Guid(guidString);
return true;
}
catch
{
return false;
}
}

Here is my original posting:

public bool CheckGuid(string guidString)
{
bool response = false;
try
{
System.Text.RegularExpressions.Regex isGuid =
new System.Text.RegularExpressions.Regex(@"^(\{){0,1}[0-9a-fA-F]{8}\-[0-9a-fA-F]{4}\-[0-9a-fA-F]{4}\-[0-9a-fA-F]{4}\-[0-9a-fA-F]{12}(\}){0,1}$",
System.Text.RegularExpressions.RegexOptions.Compiled);
response = isGuid.IsMatch(guidString);
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}

return response;
}