• Characters are the fundamental building blocks of C# program code. Every program is composed of a sequence of characters that’s interpreted by the compiler as a series of instructions used to accomplish a task.
string is a series of characters treated as a single unit. A
string may include letters, digits and the various special characters:
$ and others.
string provides eight constructors.
strings are immutable—their character contents cannot be changed after they’re created.
Length determines the number of characters in a