C Sharp

A substring in C# is a contiguous sequence of characters within a string. Basically, a substring is a portion of a string. This article and code examples demonstrate how to retrieve a substring from a string using C# and .NET Core. 

C# String.Substring method 

In C# and .NET, a string is represented by the String class. The String.Substring method retrieves a substring from a string instance in C#. The method has the following two overloaded forms. 

Substring(Int32) - Retrieves a substring from the specified position to the end of the string.Substring(Int32, Int32 - Retrieves a substring from this instance from the specified position for the specified length.

Get first n characters substring from a string in C# 

String characters are zero-indexed. Means, the position of the first characters in a string starts at 0th position. 

Let’s say, you want to get a substring of first 12 characters from a string. We can use the Substring method and pass it starting index 0 and length of the substring 12 to get first 12 char substring from a string. 

 // C# program to demonstrate the 
// String.Substring Method (startIndex) 
using System;  
class CodersArts{ 
// Main Method 
public static void Main()
{
// define string  
String str = "SusheelKumarVishwakarma"; 
Console.WriteLine("String    : " + str);  
// retrieve the substring from index 5  
Console.WriteLine("Sub String1: " + str.Substring(5)); 
// retrieve the substring from index 8    
Console.WriteLine("Sub String2: " + str.Substring(8));  
 }
}

Output:

String    : SusheelKumarVishwakarma
Sub String1: elKumarVishwakarma
Sub String2: Sushe