soap serilizer does not support seriziling generic type

The SoapFormatter class can only serialize objects that could have been created with .NET 1.1.

As generic types were not introduced until .NET 2.0, they cannot therefore be serialized.

If you're trying to serialize a List, then you could use an ArrayList instead or, if you're trying to serialize a generic Dictionary then you could use a Hashset.

Otherwise, I'd use the BinaryFormatter instead.