Dev2.PathOperations.Dev2FileSystemProvider.PathExist C# (CSharp) Method

        public bool PathExist(IActivityIOPath dst)
        {
            bool result;

            if (!RequiresAuth(dst))
            {
                result = PathIs(dst) == enPathType.Directory ? Directory.Exists(dst.Path) : File.Exists(dst.Path);
            }
            else
            {

                try
                {
                    // handle UNC path
                    SafeTokenHandle safeTokenHandle;
                    bool loginOk = LogonUser(ExtractUserName(dst), ExtractDomain(dst), dst.Password, LOGON32_LOGON_INTERACTIVE, LOGON32_PROVIDER_DEFAULT, out safeTokenHandle);


                    if (loginOk)
                    {
                        using (safeTokenHandle)
                        {

                            WindowsIdentity newID = new WindowsIdentity(safeTokenHandle.DangerousGetHandle());
                            using (WindowsImpersonationContext impersonatedUser = newID.Impersonate())
                            {
                                // Do the operation here

                                result = PathIs(dst) == enPathType.Directory ? Directory.Exists(dst.Path) : File.Exists(dst.Path);

                                // remove impersonation now
                                impersonatedUser.Undo();
                            }
                            newID.Dispose();
                        }
                    }
                    else
                    {
                        // login failed
                        throw new Exception("Failed to authenticate with user [ " + dst.Username + " ] for resource [ " + dst.Path + " ] ");
                    }
                }
                catch (Exception ex)
                {
                    Dev2Logger.Log.Error(ex);
                    throw;
                }
            }

            return result;
        }