This exception indicates that you attempted to use an invalid URI, usually in the Uri constructor. For a description of the URI format, see http://www.ietf.org/rfc/rfc2396.txt. public class UriFormatException : FormatException { // Public Constructors public UriFormatException ( ); public UriFormatException (string textString ); // Protected Constructors protected UriFormatException (System.Runtime.Serialization.SerializationInfo serializationInfo , System.Runtime.Serialization.StreamingContext streamingContext ); } HierarchyObject Exception(System.Runtime.Serialization.ISerializable) SystemException FormatException UriFormatException |