Remove Unwanted Characters From String In C#

Introduction
In this article we will learn how to remove unwanted character or words from a string in c#. Remove unwanted characters from a string using LINQ. 

Previous Updates
In previous articles we have learnt Showing Chart With Database In Asp.Net Using C#. Maintain state of dynamic added userConrol in asp.net using c#. 

Description:
I have faced one scenerio when any characters can appear in my input string, and I only want to keep the characters that I want (without messing up the order of course). So here is the best practice to remove that unwanted characters from string.
Remove Special Character from a String using Regex

class Program {   static void Main(string[] args)   { string filteredString = RemoveUnwantedCharacters("*73AB-#g@JP__0328hf014num98k",                                          "AB-0123456789@JP%-.".ToCharArray());    } private static string RemoveUnwantedCharacters(string input,                                                 char[] allowedCharacters)  {             var filtered = input.ToCharArray()                 .Where(c => allowedCharacters.Contains(c))                 .ToArray();             return new String(filtered);  } }

Insert Only Numeric values in Asp Textbox using Regex.

Output:
In output it will returnall the characters which are pass as allowedCharacters and remove all other character from input .

73AB-@JP032801498