Cannot convert null literal to non-nullable reference type.

Non-nullable field '_remoteEndPoint' must contain a non-null value when exiting constructor. Consider adding the 'required' modifier or declaring the field as nullable.

Non-nullable field '_udpClient' must contain a non-null value when exiting constructor. Consider adding the 'required' modifier or declaring the field as nullable.

Nullability of reference types in type of parameter 'sender' of 'void FileReceiverNewMessage(object sender, LogMessage log)' doesn't match the target delegate 'EventHandler<LogMessage>' (possibly because of nullability attributes).

Nullability of reference types in type of parameter 'sender' of 'void FileReceiverNewMessages(object sender, IReadOnlyCollection<LogMessage> e)' doesn't match the target delegate 'EventHandler<IReadOnlyCollection<LogMessage>>' (possibly because of nullability attributes).

Nullability of reference types in type of parameter 'sender' of 'void FileReceiverNewMessage(object sender, LogMessage log)' doesn't match the target delegate 'EventHandler<LogMessage>' (possibly because of nullability attributes).

Nullability of reference types in type of parameter 'sender' of 'void FileReceiverNewMessages(object sender, IReadOnlyCollection<LogMessage> e)' doesn't match the target delegate 'EventHandler<IReadOnlyCollection<LogMessage>>' (possibly because of nullability attributes).

The variable 'e' is declared but never used

Non-nullable field '_server' must contain a non-null value when exiting constructor. Consider adding the 'required' modifier or declaring the field as nullable.

Nullability of reference types in type of parameter 'sender' of 'void TcpReceiver.AcceptAsyncCompleted(object sender, SocketAsyncEventArgs e)' doesn't match the target delegate 'EventHandler<SocketAsyncEventArgs>' (possibly because of nullability attributes).

Cannot convert null literal to non-nullable reference type.

Non-nullable field '_remoteEndPoint' must contain a non-null value when exiting constructor. Consider adding the 'required' modifier or declaring the field as nullable.

Non-nullable field '_udpClient' must contain a non-null value when exiting constructor. Consider adding the 'required' modifier or declaring the field as nullable.

Cannot convert null literal to non-nullable reference type.

Non-nullable field '_fullName' must contain a non-null value when exiting constructor. Consider adding the 'required' modifier or declaring the field as nullable.

Non-nullable property 'Name' must contain a non-null value when exiting constructor. Consider adding the 'required' modifier or declaring the property as nullable.

Non-nullable field '_server' must contain a non-null value when exiting constructor. Consider adding the 'required' modifier or declaring the field as nullable.

Nullability of reference types in type of parameter 'sender' of 'void TcpReceiver.AcceptAsyncCompleted(object sender, SocketAsyncEventArgs e)' doesn't match the target delegate 'EventHandler<SocketAsyncEventArgs>' (possibly because of nullability attributes).

Nullability of reference types in type of parameter 'newSocket' of 'void TcpReceiver.Start(object newSocket)' doesn't match the target delegate 'ParameterizedThreadStart' (possibly because of nullability attributes).