We often come across strings in C# programming language. A string is a sequence of characters, which is used to store and manipulate text. It is one of the most commonly used data types in C#. Strings are immutable, which means that once a string is created, it cannot be changed. In this article, we will discuss the different types of strings in C#.

What is a String?
A string is a sequence of characters, which is used to store and manipulate text. It is one of the most commonly used data types in C#. Strings are immutable, which means that once a string is created, it cannot be changed.

String Type Variables
String type variables are used to store strings in C#. They are declared using the string keyword. For example:

string ch = “”S””;
string word = “”String””;
string text = “”This is a string.””;
In the above example, three string type variables are declared and initialized with different values.

String and string
The string keyword is used to declare a string type variable. However, the string keyword is also used to create a string object. For example:

string s1 = new string(“”Hello World!””);
In the above example, a string object is created using the string keyword.

String as char Array
A string can also be represented as an array of characters. For example:

char[] chars = {‘H’, ‘e’, ‘l’, ‘l’, ‘o’};
string s2 = new string(chars);
In the above example, an array of characters is declared and initialized with different values. Then, a string object is created using the string keyword and the array of characters.

Escape Char \
The backslash (\) character is used to escape characters in a string. For example:

string s3 = “”This is a \””string\””.””;
In the above example, the backslash character is used to escape the double quotes.

Escape Sequence
An escape sequence is a sequence of characters that is used to represent a special character. For example:

string s4 = “”This is a \t tab.””;
In the above example, the \t escape sequence is used to represent a tab character.

Multi-line String
A multi-line string is a string that spans multiple lines. For example:

string s5 = @””This is a
multi-line
string.””;
In the above example, the @ symbol is used to create a multi-line string.

String Concatenation
String concatenation is the process of combining two or more strings into a single string. For example:

string s6 = “”Hello “” + “”World!””;
In the above example, two strings are combined into a single string using the + operator.

String Interpolation
String interpolation is the process of inserting a variable into a string. For example:

string name = “”John””;
string s7 = $””Hello {name}!””;
In the above example, the variable name is inserted into the string using the $ symbol.

Conclusion
In this article, we discussed the different types of strings in C#. We saw how strings are declared and initialized using the string keyword. We also saw how strings can be represented as an array of characters, and how escape characters and escape sequences are used to represent special characters. Finally, we saw how strings can be concatenated and interpolated.