public class Program

{

    public static void Main()

    {

        bool marker = false;

        bool condition = true, condition2 = true;

        if (condition)

        {

            marker = true;

        //do stuff

        }

​

        if (marker)

        {

        //do other stuff

        }

​

        marker = false;

        if (condition2)

        {

            marker = true;

        //do stuff

        }

​

        if (marker)

        {

        //do other stuff

        }

    }

}