How to make a class Thread Safe [closed]

Answer 1

in my opinion the provided code above is not thread safe any more: in the previous solution you had to instatiate a new object of SharedLogger and the method Write existed once for every object.

Now you just have one Write method, which is used by all threads, example:

thread 1: SharedLogger.Write("Thread 1")

thread 2: SharedLogger.Write("Thread 2");

   public static void Write(string s)
   {
       // thread 1 is interrupted here <=
       lock (_lock)
       {
           _writer.Write(s);
       }
   }

• thread 1 wants to write a message, but is interrupted by thread 2 (see comment)

• thread 2 overrides the message of thread 1 and is interrupted by thread 1

• thread 1 gets the lock and writes "Thread 2"

• thread 1 releases the lock
• thread 2 gets the lock and writes "Thread 2"
• thread 2 releases the lock

correct me when I am wrong ...