In steps 1 to 10, we created a blank solution and gave it a proper name. And then we added a .NET Standard 2.0 class library to the solution. In steps 11 and 12, we renamed the default Class1.cs to something more meaningful. Yes, you can always delete this class and create a new one. And, in step 13, we created two simple methods for the addition and subtraction of two integers.
Finally, we performed a quick build in step 14 for syntax checking.