No discussion about a foundation class library would be complete without talking about the capabilities it provides for storing and manipulating strings. We have already covered some aspects of string manipulation, such as converting bytes to strings using various encoding schemes. In this section, let's look at some other important string manipulation classes provided by the .NET Framework.
The System.String class that we are used to by now stores a string of Unicode characters. This class offers many useful features, such as the following:
Obtaining the length of the string
Checking if two strings are equal
Comparing two strings for a lexical relationship
Concatenating one or more strings to create a new string
Replacing a substring with ...