Create Extension Method of enum in C#

Brief

Convert enum to dictionary.

1. CustomEnum enum
2. Extension class
3. Program class

CustomEnum

  public enum CustomEnum
  {
    New = 2,
    Old,
    Active,
    InActive,
    Expired
  }

Extension Class

  public static class Extension
  {
    public static Dictionary<TKey, TValue> ToDictionary<TKey, TValue>(this Type e)
    {
      var dictionary = new Dictionary<TKey, TValue>();
      if (e.IsEnum)
      {
        var array = e.GetEnumValues();
        foreach (var t in array)
        {
          dictionary.Add((TKey)t, (TValue)t);
        }
      }

      return dictionary;
    }
  }

Program Class

  class Program
  {
    static void Main(string[] args)
    {
      var dictionary = typeof(CustomEnum).ToDictionary<int, CustomEnum>();
      var dictionaryReverse = typeof(CustomEnum).ToDictionary<CustomEnum, int>();
      Console.ReadKey();
    }
  }

Output