Question

I need to attach an event handler to an object, and I placed this code on a button click event. However, I noticed that this will cause the same event to attach multiple times with each click.

Is there a way to run a piece of code on class creation? The class in question is a static class btw.

I can do something like:

if (bool == false)
{
attach event handler;
bool = true;
}

Just not sure if this is the right way to do it. Thanks.

Answer 1

There are static constructors, that are (in principle) only run once per class.

Something like this:

public static class MyStaticClass
{
   public static int MyStaticProperty;

   //no accessors required, as this is never explicitly invoked
   static MyStaticClass() //no parameters either
   {
      MyStaticProperty = 100;
   }
}
....
//writes: 100
Console.WriteLine(MyStaticClass.MyStaticProperty);

However, if a constructor won’t do it, because you have some parameters that need to be set, or there are some prerequisite steps that need to be done, I would indeed recommend a private boolean check, as you have done.