Can't run tests about xunit.stafact HOT 2 CLOSED

[assembly: TestFramework("XUnitTestProject.MyTestFramework", "XUnitTestProject")]

namespace XUnitTestProject
{
    public class MyTestFramework : XunitTestFramework
    {
        public MyTestFramework(IMessageSink messageSink)
            : base(messageSink)
        {
            DisposalTracker.Add(new AssemblyResolver());
        }
    }

    internal class AssemblyResolver : IDisposable
    {
        public AssemblyResolver()
        {
            AppDomain.CurrentDomain.AssemblyResolve += AssemblyResolve;
        }

        public void Dispose()
        {
            AppDomain.CurrentDomain.AssemblyResolve -= AssemblyResolve;
        }

        private Assembly AssemblyResolve(object sender, ResolveEventArgs args)
        {
            var assemblyName = new AssemblyName(args.Name);
            foreach (var filePath in LookupFiles(assemblyName.Name))
            {
                if (File.Exists(filePath))
                {
                    return Assembly.LoadFrom(filePath);
                }
            }
            return null;
        }

        private IEnumerable<string> LookupFiles(string name)
        {
            var fileName = name + ".dll";

            // resolve assemblies during test execution
            yield return Path.Combine(Environment.CurrentDirectory, fileName);
            // resolve assemblies during Visual Studio test discovery
            yield return Path.Combine(Path.GetDirectoryName(Assembly.GetExecutingAssembly().Location), fileName);
        }
    }
}