using System;

using System.Linq;

using System.Collections.Generic;

public class Program

{

    public static void Main()

    {

        IDictionary<string, string> dict = new Dictionary<string, string>();

        IEnumerable<string> pid = "Neil Stevens".Split(' ').Append("Neil Stevens").Append("neil.stevens@capp.co");

        dict.Add("note1", "This is some note with the name Neil Stevens");

        dict.Add("note2", "This note has the email neil.stevens@capp.co");

        dict.Anonymise(pid);

        foreach (var s in dict)

        {

            Console.WriteLine(s.Value);

        }

    }

}

​

public static class DictionaryExtensions

{

    public static void Anonymise(this IDictionary<string, string> dictionary, IEnumerable<string> pid)

    {

        foreach (var key in dictionary.Keys)

        {

            var value = dictionary[key].Anonymise(pid);

            dictionary[key] = value;

        }

    }

}

​

public static class StringExtensions

{

    public static string Anonymise(this string data, IEnumerable<string> pid)

    {

        if (string.IsNullOrWhiteSpace(data))

        {

            return null;

        }

​

        foreach (var s in pid)

        {

            data = data.Replace(s, "*****");

        }

        return data;

    }

}