Error

Web Part Error: A Web Part or Web Form Control on this Page cannot be displayed or imported. The type Appointment_Application.VisualWebPart1.VisualWebPart1, Appointment Application, Version=1.0.0.0, Culture=neutral, PublicKeyToken=50b8a7b5455f6c2f could not be found or it is not registered as safe. Correlation ID: 58f17b9e-b95e-e0fa-d295-b93f935cd9f2.