In this chapter, I'll cover a number of other topics that are important in using C#, but that don't fit neatly into one of the other chapters. These include string handling, nullable types, the
Main method, documentation comments, and nested types.
0s and 1s are fine for internal computation, but for human-readable input and output, we need strings of characters. The BCL provides a number of classes that make string handling easy.
The C# predefined type
string represents the .NET class
System.String. The most important things to know about strings are the following:
Strings are arrays of Unicode characters.
Strings are immutable—they cannot be changed.
string type has many useful string-manipulation members, ...