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Substring Method (Int32)
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String.Substring Method (Int32)

Retrieves a substring from this instance. The substring starts at a specified character position and continues to the end of the string.

Namespace:  System
Assembly:  mscorlib (in mscorlib.dll)

public string Substring(
	int startIndex


Type: System.Int32

The zero-based starting character position of a substring in this instance.

Return Value

Type: System.String
A string that is equivalent to the substring that begins at startIndex in this instance, or Empty if startIndex is equal to the length of this instance.


startIndex is less than zero or greater than the length of this instance.

The index is zero-based.


This method does not modify the value of the current instance. Instead, it returns a new string that begins at the startIndex position in the current string.

If startIndex is equal to zero, the method returns the original string unchanged.

The following example demonstrates obtaining a substring from a string.

using System;

public class SubStringTest {
    public static void Main() {

        string [] info = {"Name: Felica Walker", "Title: Mz.", "Age: 47", "Location: Paris", "Gender: F"};
        int found = 0;

        Console.WriteLine("The initial values in the array are:");
        foreach (string s in info)

        Console.WriteLine("{0}We want to retrieve only the key information. That is:", Environment.NewLine);        

        foreach (string s in info) {
            found = s.IndexOf(":");
            Console.WriteLine(s.Substring(found + 1));
// The example displays the following output to the console: 
//       The initial values in the array are: 
//       Name: Felica Walker 
//       Title: Mz. 
//       Age: 47 
//       Location: Paris 
//       Gender: F 
//       We want to retrieve only the key information. That is: 
//       Felica Walker 
//       Mz. 
//       47 
//       Paris 
//       F

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5, 3.0, 2.0, 1.1

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

XNA Framework

Supported in: 3.0, 2.0, 1.0

.NET for Windows Phone apps

Supported in: Windows Phone 8.1, Windows Phone Silverlight 8.1, Windows Phone Silverlight 8

Portable Class Library

Supported in: Portable Class Library
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