Remove dots(.), hyphens(-), spaces,braces’(‘ and ‘)’ from string in C#

If you want to remove dots(.), hyphens(-), spaces, braces ‘(‘ and ‘)’ from a string in C# then you can use any solution given below.

string str = "A sample string having many . and ......It also has a hyphen (-) and too Many hyphens(------) Enjoy!!";

// Solution1: Use of String concat Function and Lambda Extension Method
var solution1 = string.Concat(str.Where(i => !new[] { '.', ' ', '-', '(', ')' }.Contains(i)));

Response.Write(solution1);


// Solution2: Use of Regular Expression. (Make sure you add using System.Text.RegularExpressions; on top of your page before using below solution2)
var solution2 = Regex.Replace(str, "[ ().-]+", "");

Response.Write(solution2);
           
           
// Solution3 : Use of Lambda and Extension Methods
var solution3 = str.ToCharArray().Where(i => i != ' ' && i != '-' && i != '.' && i != '(' && i != ')' ).Aggregate(" ", (a, b) => a + b);

Response.Write(solution3);

Remove Duplicates From List in C#

To Remove Duplicates From List can be done by many different ways. You can use Distinct extension method to remove duplicates.

Below program that removes duplicates from the list in C#.

using System;
using System.Collections.Generic;
using System.Linq;

class Program
{
    static void Main()
    {
       // List having duplicate integer elements.
       List<int> list = new List<int>();
       list.Add(7);
       list.Add(2);
       list.Add(5);
       list.Add(5);
       list.Add(2);
       list.Add(3);
       list.Add(7);

        // Get distinct elements and convert again into a list.
       List<int> distinct = list.Distinct().ToList();

       foreach (int value in distinct)
       {
           Console.WriteLine("Distinct : {0}", value);
       }
    }
}

 OR

You can use LINQ to object to remove duplicates from list,

using System;
using System.Collections.Generic;
using System.Linq;

class Program
{
    static void Main()
    {
        // List having duplicate string elements.
        List<string> list = new List<string>();
        list.Add("A");
        list.Add("A");               
        list.Add("C");
        list.Add("D");
        list.Add("B");
        list.Add("A");
        list.Add("E");
        list.Add("E");

        // Get distinct elements.
        var distinct = (from item in list  orderby item  select  item).Distinct();
       
        foreach (string value in distinct)
        {
             Console.WriteLine("Distinct : {0}", value);
        }
    }
}