How to find dictionary duplicate values in C#

For Reference:

//initialize a dictionary with keys and values.    
Dictionary<int, string> plants = new Dictionary<int, string>() {    
    {1,"Speckled Alder"},    
    {2,"Apple of Sodom"},    
    {3,"Hairy Bittercress"},    
    {4,"Pennsylvania Blackberry"},    
    {5,"Apple of Sodom"},    
    {6,"Water Birch"},    
    {7,"Meadow Cabbage"},    
    {8,"Water Birch"}    
};  
  
Response.Write("<b>dictionary elements........</b><br />");
        
//loop dictionary all elements   
foreach (KeyValuePair<int, string> pair in plants)  
{
    Response.Write(pair.Key + "....."+ pair.Value+"<br />");
}  
  
//find dictionary duplicate values.  
var duplicateValues = plants.GroupBy(x => x.Value).Where(x => x.Count() > 1);

Response.Write("<br /><b>dictionary duplicate values..........</b><br />");

//loop dictionary duplicate values only            
foreach(var item in duplicateValues)  
{
    Response.Write(item.Key+"<br />");
}   

By using XML

1.

counties = XDocument.Load(HttpContext.Current.Server.MapPath("/data/counties.xml"))

.Descendants("Row")

.GroupBy(i => i.Attribute("Code").Value)

.Where(g => g.Count() == 1)

.Select(g => new { Code = g.Key, Desc = g.First().Attribute("Descrip").Value })

.ToDictionary(x => x.Code, x => x.Desc);

2. 

How to Remove Duplicates and Get Distinct records from List using LINQ?

using System;

using System.Collections.Generic;

using System.Data;

using System.Linq;

namespace AbundantCode

{

internal class Program

{

//How to Remove Duplicates and Get Distinct records from List using LINQ ?

private static void Main(string[] args)

{

List<Employee> employees = new List<Employee>()

{

new Employee { EmpID = 1 , Name ="AC"},

new Employee { EmpID = 2 , Name ="Peter"},

new Employee { EmpID = 3 , Name ="Michael"},

new Employee { EmpID = 3 , Name ="Michael"}

};

//Gets the Distinct List

var DistinctItems = employees.GroupBy(x => x.EmpID).Select(y => y.First());

foreach(var item in DistinctItems)

Console.WriteLine(item.Name);

Console.ReadLine();

}

}

public class Employee

{

public string Name { get; set; }

public int EmpID { get; set; }

}

}

3. 

How to find the duplicate items in a list?

string[] ss ={ "1","1","1"};
            List<string> myList = new List<string>();
 
 
            foreach (String s in&nbsp;ss)
            {
                if (!myList.Contains(s))
                {
                 myList.Add(s);
                }
            }
 
            foreach (String s in&nbsp;myList)
            {
                Console.WriteLine(s);
            }