c# - C# 上的“值不在预期范围内”，用于在 HPQC 上添加错误

Question

此功能应该在 HPQC 上添加一个新缺陷。但是，当 null 在 .addItem() 中时，它会给出“值不在预期范围内”。有谁知道可能是什么问题？

public static void addBug()
{
            String qcUrl = "LINK TO HPQC";
            String qcDomain = "DOMAIN";
            String qcProject = "PROJECT";
            String qcLoginName = "NAME";
            String qcPassword = "PASS";

            TDConnection connection = new TDConnection();
            connection.InitConnectionEx(qcUrl);
            connection.ConnectProjectEx(qcDomain, qcProject, qcLoginName, qcPassword);

            BugFactory bugFactory = connection.BugFactory;
            Bug bug = bugFactory.AddItem(null);

            bug.Status = "New";
            bug.Project = "QCIntegration";
            bug.Summary = "Short description of the bug";
            bug.DetectedBy = "Aaron Evans";
            bug.AssignedTo = "Nobody";
            bug.Priority = "Low";
            bug.Post();
}