Basic syntax

A stack variable declaration needs to meet the following requirements:

• The Stack keyword, its element type between left and right arrow characters, and a unique name
• The new keyword to initialize the stack in memory, followed by the Stack keyword and element type between arrow characters
• A pair of parentheses capped off by a semicolon

In blueprint form, it looks like this:

Stack<elementType> name = new Stack<elementType>();

Unlike the other collection types you've worked with, stacks can't be initialized with elements when they're created. 

C# supports a non-generic version of the Stack type that doesn't require you to define the type of element in the stack:

Stack myStack = new Stack();

However, this is less safe and more costly than using the preceding generic version. You can read more about Microsoft's recommendation at https://github.com/dotnet/platform-compat/blob/master/docs/DE0006.md.

Your next task is to...