String And StringBuilder

What is mean by String?

• A string is a sequential collection of Unicode characters that is used to represent text.
• A string object is sequential of System.Char objects that represent a string.
• The value of the String object is the content of the sequential collection, and that values are immutable(that is, it is read-only).
• The maximum size of a string object in memory is 2 GB or about 1 billion characters.

StringBuilder

The String object is immutable. Every time you use one of the methods in the System.sting class, you create a new string object.

• In situations where you need to perform repeated modifications to a string, the overhead associated with creating a new String, the overhead associated with creating a new String object can be costly.
• For example, using the StringBuilder class can boost performance when concatenating many strings together in a loop.