public class Test
{
	public static void Main()
	{
		// ...Some code...
		System.Console.WriteLine("Before");

		new MyClass().DoSomething();

		// ...Some other code...
		System.Console.WriteLine("After");
	}
}

public class MyClass
{
	private int _myVar;

	public void DoSomething()
	{
		// ...Do something...

		_myVar = 1;

		System.Console.WriteLine("Inside");
	}
}