How to keep only Alphabets in a String in C# - Step by Step Examples

How to keep only Alphabets in a String in C# ?

Answer

To keep only alphabets in a string in C#, you can use regular expressions from the 'System.Text.RegularExpressions' namespace to remove non-alphabetic characters.

✐ Examples

1 Keep Only Alphabets in "Hello123 World"

In this example,

We import the 'System.Text.RegularExpressions' namespace to use regular expressions.
We create a string variable str1 with a value of "Hello123 World".
We compile a regular expression pattern [^a-zA-Z] to match non-alphabetic characters.
We use the Regex.Replace() method to replace all non-alphabetic characters with an empty string.
Finally, we print the modified string str1.

C# Program

using System;
using System.Text.RegularExpressions;

public class Program
{
    public static void Main()
    {
        string str1 = "Hello123 World";
        string pattern = "[^a-zA-Z]";
        Regex reg = new Regex(pattern);
        str1 = reg.Replace(str1, "");
        Console.WriteLine("Modified string: " + str1);
    }
}

Output

Modified string: HelloWorld

2 Keep Only Alphabets in "apple@banana"

In this example,

We import the 'System.Text.RegularExpressions' namespace to use regular expressions.
We create a string variable str2 with a value of "apple@banana".
We compile a regular expression pattern [^a-zA-Z] to match non-alphabetic characters.
We use the Regex.Replace() method to replace all non-alphabetic characters with an empty string.
Finally, we print the modified string str2.

C# Program

using System;
using System.Text.RegularExpressions;

public class Program
{
    public static void Main()
    {
        string str2 = "apple@banana";
        string pattern = "[^a-zA-Z]";
        Regex reg = new Regex(pattern);
        str2 = reg.Replace(str2, "");
        Console.WriteLine("Modified string: " + str2);
    }
}

Output

Modified string: applebanana

Summary

In this tutorial, we learned How to keep only Alphabets in a String in C# language with well detailed examples.

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How to keep only Alphabets in a String in C# - Step by Step Examples

How to keep only Alphabets in a String in C# ?

Answer

✐ Examples

1 Keep Only Alphabets in "Hello123 World"

C# Program

Output

2 Keep Only Alphabets in "apple@banana"

C# Program

Output

Summary

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