Name already in use

Fixes #2078.

…r testing

upgrade caused InvalidVersion: Invalid version: '0.23ubuntu1' on Ubuntu due to setuptools dropping support for that version format

- If a method is virtual AND generic, it cannot be overridden by the python class. Hence the method call is deferred to the base class.
- Added a unit test which verifies this behavior is now working.

NOTE: The test causes crash when run from `PythonTestRunner`. See #2035

Fix implementing a generic interface with a Python class

since RuntimeMethodHandle does not encode generic arguments, I had to supply RuntimeTypeHandle of the declaring type to be able to get fully specified method

Python 3.11

Fix positive `PyInt` converted to negative `BigInteger`

BigInteger constructor uses the sign bit in the first byte. Since we explicitly handle the sign, the fix is to prepend a zero byte to the number, which does not change it, but ensures sign bit is zero.

fixes #1990

Allow decoders to decode Python types derived from primitives

…s when target type is System.Object

useful to be able to change what numpy.float64 is converted to

related to #1957

this is an alternative to #1958

Delete target object from event handler collections when it has no more event handlers

…re event handlers

fixes #1972