Mysterious Negative Counter Value

Question

I\'m creating new threads for every sql call for a project. There are millions of sql calls so I\'m calling a procedure in a new thread to handle the sql calls.

In doing

Answer 1

Nothing mysterious about it, you are using threading, right?

The ++ and -- operator aren't thread safe. Do this.

public static void processline()
{
    Interlocked.Increment(ref counter);
    sql.ExecuteNonQuery();
    Interlocked.Decrement(ref counter);
}