Convert IFC GUID
dotnet add package IfcGuid
Alternatively just copy the source code into your project.
using static IfcGuid;
ToIfcGuid(new Guid("1f41ae2a-fae2-482c-99a9-11070ec1df8f"));
// => 0VGQug_k98B9cf4GSEmT_F
FromIfcGuid("01bhO9fsz_RxNh9a_y9jls");
// => 0196b609-a76f-7e6f-b5eb-264fbc26dbf6