String Class and Methods

String Class and Methods

In C#, the string class is used to represent a sequence of characters. It is a reference type and is declared using the keyword “string”.

The string class provides various methods to perform operations on strings. Here are some of the most commonly used methods:

1. Length: This method returns the number of characters in the string.
2. Concat: This method is used to concatenate two or more strings.
3. IndexOf: This method returns the index of the first occurrence of a specified character or substring.
4. Substring: This method is used to extract a substring from a string.
5. Replace: This method is used to replace all occurrences of a specified character or substring with another string.
6. ToUpper and ToLower: These methods are used to convert a string to uppercase or lowercase.
7. Trim: This method is used to remove all leading and trailing white spaces from a string.
8. Split: This method is used to split a string into an array of substrings based on a specified delimiter.
9. Contains: This method returns a boolean value indicating whether a specified substring is present in a string.
10. CompareTo: This method is used to compare two strings and returns an integer indicating their relative order.

These are just a few of the many methods available in the string class. The string class and its methods are fundamental to string manipulation in C# and are used extensively in programming.