C# ต้องการเพิ่ม User,Pass ใน Windows Credentials ขอความกรุณาด้วยครับ

    public UserPass GetCredentials()
    {
        var cm = new Credential {Target = CredentialName};
        if (!cm.Exists())
            return null;

        cm.Load();
        var up = new UserPass(cm);
        return up;
    }

    public bool SetCredentials(UserPass up)
    {
        var cm = new Credential {Target = CredentialName, PersistanceType =  PersistanceType.Enterprise, Username = up.UserName, Password = up.Password};
        return cm.Save();
    }

    public void RemoveCredentials()
    {
        var cm = new Credential { Target = CredentialName };
        cm.Delete();

    }