C# Remove String from String

How to Remove a substring from a string in C#

This tutorial explains how to remove a string from a string in C#.

This tutorial will show you three different ways to remove substrings from a string.

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Removing a string from a string with the string Replace method

One easy way to remove substrings from a substring is to use the string Replace method.

The following sample code removes "C# Programing" from "Online C# Programming Tutorials":

using System;
namespace CSharp_Remove_String_From_String_Example
{
    class Program
    {
        static void Main(string[] args)
        {
            string textString = "Online C# Programming Tutorials";
            string stringToRemove = "C# Programming";
            //Replace with an empty string
            //string emptyString = "";
            string emptyString = string.Empty;
            string newTextString = textString.Replace(stringToRemove, emptyString);
            //Write to the console
            Console.WriteLine(newTextString);
        }
    }
}

Output:

Online  Tutorials

Removing a string from a string with the string Join and Split methods

Another easy way to remove a string from a string is to use the string Join and Split methods.

The following sample code shows an example of removing a string from a string using Join() and Split():

using System;
namespace CSharp_Remove_String_From_String_Example
{
    class Program
    {
        static void Main(string[] args)
        {
            string textStrings = "Let's learn C# programming! There are many C# programming tutorials.";
            string newString = string.Join("", textStrings.Split("C# programming"));
            //Write to the console
            Console.WriteLine(newString);
        }
    }
}

Output:

Let's learn ! There are many  tutorials.

Removing the first occurrence of a substring

If you want to remove only the first occurrence of a substring from a string, you can use Remove and IndexOf.

Sample code:

using System;
namespace CSharp_Remove_String_From_String_Example
{
    class Program
    {
        static void Main(string[] args)
        {
            string textString = "Online C# Programming Tutorials! Best C# Programming Books!";
            string stringToRemove = "C# Programming";
            //Find the index
            int index = textString.IndexOf(stringToRemove);
            //Get the length of the string to remove
            int length = stringToRemove.Length;
            //Remove
            string newTextString = textString.Remove(index, length);
            //Write to the console
            Console.WriteLine(newTextString);
        }
    }
}

Output:

Online  Tutorials! Best C# Programming Books!

Summary

In this tutorial, you have learned how to remove a substring from a string in C# using three different ways.