Pass code to a method as an argument

Question

I have a list of methods that do pretty much the same thing, except a few differences:

void DoWork(string parameter1, string parameter2)

{

//Common code
...

//Custom code
...

//Common code
...

}

I want to streamline the solution with reusing the common code by passing custom code from another method.

I assume I have to use an action with parameters to accomplish this, but can't figure out how.

Answer 1

You could try the Template method pattern

Which basically states soemthing like this

abstract class Parent
{
   public virtual void DoWork(...common arguments...)
   {
      // ...common flow
      this.CustomWork();
      // ...more common flow
   }

   // the Customwork method must be overridden
   protected abstract void CustomWork();
}

In a child class

class Child : Parent
{
   protected override void CustomWork()
   {
      // do you specialized work
   }
}

Answer 2

The other answers are great, but you may need to return something from the custom code, so you would need to use Func instead.

void Something(int p1, int p2, Func<string, int> fn)
{
   var num = p1 + p2 + fn("whatever");
   // . . .
}

Call it like this:

Something(1,2, x => { ...; return 1; });

Or:

int MyFunc(string x)
{
    return 1;
}

Something(1,2 MyFunc);