How to Replace All Occurrences of a Substring in a String in C# - Step by Step Examples

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How to Replace All Occurrences of a Substring in a String in C# ?

Answer

To replace all occurrences of a substring in a string in C#, you can use the Replace method of the String class.

✐ Examples

1 Replacing Substring "Hello" with "Hi"

In this example,

We create a string named str.
We call the Replace method on str with the substring to be replaced and the replacement string as arguments.
The Replace method returns a new string with all occurrences of the substring replaced.
Finally, we print the modified string.

C# Program

using System;

class Program
{
    static void Main()
    {
        string str = "Hello World Hello";
        string newStr = str.Replace("Hello", "Hi");
        Console.WriteLine(newStr);
    }
}

Output

Hi World Hi

2 Replacing Character 'o' with 'X'

In this example,

We create a string named str.
We call the Replace method on str with the character to be replaced and the replacement character as arguments.
The Replace method returns a new string with all occurrences of the character replaced.
Finally, we print the modified string.

C# Program

using System;

class Program
{
    static void Main()
    {
        string str = "Hello World Hello";
        string newStr = str.Replace("o", "X");
        Console.WriteLine(newStr);
    }
}

Output

HellX WXrld HellX

Summary

In this tutorial, we learned How to Replace All Occurrences of a Substring in a String in C# language with well detailed examples.

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How to Replace All Occurrences of a Substring in a String in C# - Step by Step Examples

How to Replace All Occurrences of a Substring in a String in C# ?

Answer

✐ Examples

1 Replacing Substring "Hello" with "Hi"

C# Program

Output

2 Replacing Character 'o' with 'X'

C# Program

Output

Summary

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