If you don't know what is Darwin Descritor you should read this article first.
To show you what it is and where you could find it here:
Also you could read about Darwin Descriptor structure here .
I have wrote simple C# implementation of DarwingDescriptors GUID converter.
Assembly: DarwinDecriptor.dll
Namespace: DarwinDecriptor
.Net Framework: 4.0
Convert Darwing Descriptor GUID to System.Guid:
var converter = new GuidConverter();
var encodedDarwinDescriptorGuid = "ykG^V5!!!!4!!!!MKKSk";
Guid decodedGuid = converter.Decode(encodedDarwinDescriptorGuid);
And vise versa (System.Guid to Darwing Descriptor GUID string):
var converter = new GuidConverter();
string darwinDescriptorGuid= converter.Encode(Guid.Parse("{91140000-0011-0000-1000-0000000FF1CE}"));