namespace System { public class DuplicateWaitObjectException : ArgumentException { public DuplicateWaitObjectException(); protected DuplicateWaitObjectException(SerializationInfo info, StreamingContext context); public DuplicateWaitObjectException(string parameterName); public DuplicateWaitObjectException(string message, Exception innerException); public DuplicateWaitObjectException(string parameterName, string message); } }