String Manipulation

String manipulation using 'System' namespace in C#.

* you can perform string manipulation using the 'System' namespace, which provides a variety of classes and methods for working with strings.

String Manipulation

String manipulation in C# involves various operations to modify, concatenate, split, search, and format strings. Here's an overview of some common string manipulation operations in C#:


string firstName = "Ayan";
string lastName = "Sarkar";
 // Concatenation using the + operator
string fullName = firstName + " " + lastName;

Combining two or more strings together.

Substring Extraction:

string sentence = "The quick brown fox jumps over the lazy dog";
// Extracting "brown"
string substring = sentence.Substring(10, 5); 

Extracting a portion of a string.


string sentence = "The quick brown fox jumps over the lazy dog";
// Returns the index of "fox" (12)
int indexOfFox = sentence.IndexOf("fox"); 

Finding the position of a substring within a string.


string sentence = "The quick brown fox jumps over the lazy dog";
// Replaces "brown" with "red"
string newSentence = sentence.Replace("brown", "red"); 

Replacing occurrences of a substring with another substring.


string sentence = "The quick brown fox jumps over the lazy dog";
 // Splits the string into an array of words
string[] words = sentence.Split(' ');

Breaking a string into substrings based on a delimiter.


string name = "Ayan";
int age = 28;
// String formatted
string fStr = string.Format("Name {0} and {1} years old.", name, age);
// String interpolation
string iStr = $"Name {name} and {age} years old.";

Formatting strings using placeholders or string interpolation.


string input = "   Hello, World!   ";
// Removes leading and trailing whitespace
string trimmedString = input.Trim(); 

Removing leading and trailing whitespace from a string.

These are just some of the basic string manipulation operations in C#. Depending on your specific requirements, you may need to use additional methods and techniques.

Here's a simple example demonstrating some common string manipulation operations:

cs Copy Code
using System;

class Program
    static void Main(string[] args)
        string str = "Hello, world!";
        // Convert to uppercase
        string upperCaseString = str.ToUpper();
        Console.WriteLine("Uppercase: " + upperCaseString);
        // Convert to lowercase
        string lowerCaseString = str.ToLower();
        Console.WriteLine("Lowercase: " + lowerCaseString);
        // Replace part of the string
        string replacedString = str.Replace("world", "everyone");
        Console.WriteLine("Replaced: " + replacedString);
        // Split the string
        string[] parts = str.Split(',');
        foreach (string part in parts)
        // Concatenate strings
        string concatString = string.Concat("Goodbye, ", str[7..]);
        Console.WriteLine("Concatenated: " + concatString);
        // Check if string starts with or ends with a specific substring
        bool startsWithHello = str.StartsWith("Hello");
        bool endsWithWorld = str.EndsWith("world");
        Console.WriteLine("Starts with 'Hello': " + startsWithHello);
        Console.WriteLine("Ends with 'world': " + endsWithWorld);
        // Check if string contains a specific substring
        bool containsHello = str.Contains("Hello");
        bool containsGoodbye = str.Contains("Goodbye");
        Console.WriteLine("Contains 'Hello': " + containsHello);
        Console.WriteLine("Contains 'Goodbye': " + containsGoodbye);
Uppercase: HELLO, WORLD!
Lowercase: hello, world!
Replaced: Hello, everyone!
Concatenated: Goodbye, world!
Starts with 'Hello': True    
Ends with 'world': False     
Contains 'Hello': True   
Contains 'Goodbye': False

This code demonstrates various operations such as converting a string to uppercase or lowercase, replacing substrings, splitting strings into arrays, concatenating strings, and checking for substrings within a string.

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