var leftBlackBoard = "Today's special is Tuna";

var rightBlackBoard = "Today's special is Tuna";

​

System.Console.WriteLine($"You ask Joseph to change the special to Salad.");

System.Console.WriteLine($"He complains that you dont make friends that way, but climbs the ladder and makes the change to leftBlackBoard anyway.");

​

leftBlackBoard = "Today's special is Salad";

​

System.Console.WriteLine($"leftBlackBoard is now '{leftBlackBoard}'.");

System.Console.WriteLine($"rightBlackBoard is unchanged '{rightBlackBoard}'.");

​

System.Console.WriteLine($"Joseph climbs the ladder again and makes the change to rightBlackBoard.");

​

rightBlackBoard  = "Today's special is Salad";

​

System.Console.WriteLine($"rightBlackBoard is now '{rightBlackBoard}' also.");

​