Remove Duplicates from a string, C#

Remove Duplicates from a string

//Rextester.Program.Main is the entry point for your code. Don't change it.
//Compiler version 4.0.30319.17929 for Microsoft (R) .NET Framework 4.5

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text.RegularExpressions;

namespace Rextester
{
    public class Program
    {
        public static void Main(string[] args)
        {
            string value1 = RemoveDuplicateChars("Csharpstar");
            string value2 = RemoveDuplicateChars("Google");
            string value3 = RemoveDuplicateChars("Yahoo");
            string value4 = RemoveDuplicateChars("CNN");
            string value5 = RemoveDuplicateChars("Line1\nLine2\nLine3");
 
            Console.WriteLine(value1);
            Console.WriteLine(value2);
            Console.WriteLine(value3);
            Console.WriteLine(value4);
            Console.WriteLine(value5);
        }
        
        static string RemoveDuplicateChars(string key)
        {
            string table="",result="";
            foreach(char value in key)
            {
                if(table.IndexOf(value) == -1)
                {
                        table += value;
                        result += value;
                }                    
            }
            return result;
        }
    }
}


run \| edit \| history \| help	0