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Nullability in constraints for type parameter 'TState' of method 'XUnitLogger.BeginScope<TState>(TState)' doesn't match the constraints for type parameter 'TState' of interface method 'ILogger.BeginScope<TState>(TState)'. Consider using an explicit interface implementation instead.

Nullability of reference types in type of parameter 'exception' of 'void TestLogger.Log<TState>(LogLevel logLevel, EventId eventId, TState state, Exception exception, Func<TState, Exception, string> formatter)' doesn't match implicitly implemented member 'void ILogger.Log<TState>(LogLevel logLevel, EventId eventId, TState state, Exception? exception, Func<TState, Exception?, string> formatter)' (possibly because of nullability attributes).

The variable 'e' is declared but never used

Cannot convert null literal to non-nullable reference type.

Do not use Assert.True(false, message) to fail a test. Use Assert.Fail(message) instead. (https://xunit.net/xunit.analyzers/rules/xUnit2020)

Nullability in constraints for type parameter 'TState' of method 'XUnitLogger.BeginScope<TState>(TState)' doesn't match the constraints for type parameter 'TState' of interface method 'ILogger.BeginScope<TState>(TState)'. Consider using an explicit interface implementation instead.

Nullability of reference types in type of parameter 'exception' of 'void TestLogger.Log<TState>(LogLevel logLevel, EventId eventId, TState state, Exception exception, Func<TState, Exception, string> formatter)' doesn't match implicitly implemented member 'void ILogger.Log<TState>(LogLevel logLevel, EventId eventId, TState state, Exception? exception, Func<TState, Exception?, string> formatter)' (possibly because of nullability attributes).

The variable 'e' is declared but never used

Cannot convert null literal to non-nullable reference type.