This exception signals an attempt to access an AppDomain that has been unloaded by AppDomain.Unload( ) . public class AppDomainUnloadedException : SystemException { // Public Constructors public AppDomainUnloadedException ( ); public AppDomainUnloadedException (string message ); public AppDomainUnloadedException (string message , Exception innerException ); // Protected Constructors protected AppDomainUnloadedException (System.Runtime.Serialization.SerializationInfo info , System.Runtime.Serialization.StreamingContext context ); } HierarchyObject Exception(System.Runtime.Serialization.ISerializable) SystemException AppDomainUnloadedException |