enum Direction{Up, Down, Left, Right}

void MoveInAllDirections()
{
    Array aDirections = System.Enum.GetValues(typeof(Direction));
    foreach(Direction d in aDirections)
        MoveIt(d);
}

void MoveIt(Direction d)
{
    //Move! Move!
    switch(d)
    {
        case Direction.Up:
        //...
    }
}