Why is CSharpOptParse UsageBuilder failing due to an XPathException only when used in an NUnit test?
问题 What is the root cause of this issue? CSharpOptParse, XslTransform.Transform(...), or NUnit? What other equivalent library could I use instead, if this problem is unfixable, that is being actively supported? I'm using version 1.0.1 of CSharpOptParse which was last modified in Feb 2005. I've have the following class (simplified for this example of course) to use along with CSharpOptParse: public enum CommandType { Usage } public class Options { [OptDef(OptValType.Flag)] [LongOptionName("help")