introduction.md

Introduction

Strings

A string in C# is an object that represents immutable text as a sequence of Unicode characters (letters, digits, punctuation, etc.). Double quotes are used to define a string instance:

string fruit = "Apple";

Methods

Strings are manipulated by calling the string's built-in methods. For example, to remove the whitespace from a string, you can use the Trim method like this:

string name = " Jane "
name.Trim()
// => "Jane"

Once a string has been constructed, its value can never change. Any methods that appear to modify a string will actually return a new string.

Concatenation

Multiple strings can be concatenated (added) together. The simplest way to achieve this is by using the + operator.

string name = "Jane";
"Hello " + name + "!";
// => "Hello Jane!"

Formatting

For any string formatting more complex than simple concatenation, string interpolation is preferred. To use interpolation in a string, prefix it with the dollar ($) symbol. Then you can use curly braces ({}) to access any variables inside your string.

string name = "Jane";
$"Hello {name}!";
// => "Hello Jane!"