BS_EventsCollection

Add a class to the MVP folder called "BS_EventsCollection".
Make the following changes to this class.

public class BS_EventsCollection 
{ 
   private System.Collections.Generic.Dictionary< 
       System.Type, 
       System.Collections.Generic.Dictionary<string, object>> _dictionary; 
   
   private object _sender; 

//----------------------------------------------------------------------- 
   public BS_EventsCollection(object Sender) 
   { 
      this._dictionary = new System.Collections.Generic.Dictionary< 
          System.Type, 
          System.Collections.Generic.Dictionary<string, object>>(); 
   
      this._sender = Sender; 
   } 
//----------------------------------------------------------------------- 
   public void Method_AddListener<T>( 
       string propertyName, 
       System.EventHandler<MVP.BS_EventArgs<T>> eventHandler) 
   { 
      System.Collections.Generic.Dictionary<string, object> eventsDictionary; 
      MVP.BS_GenericEvent<T> theEvent; 

      if (!this._dictionary.ContainsKey(typeof(T))) 
      { 
          this._dictionary.Add(typeof(T), 
              new System.Collections.Generic.Dictionary<string, object>()); 
      } 
   
      eventsDictionary = this._dictionary[typeof(T)]; 
   
      if (!eventsDictionary.ContainsKey(propertyName)) 
      { 
          eventsDictionary.Add(propertyName, new MVP.BS_GenericEvent<T>()); 
      } 
   
      theEvent = eventsDictionary[propertyName] as MVP.BS_GenericEvent<T>; 
      theEvent.OnMyEvent += eventHandler; 
   } 
//----------------------------------------------------------------------- 
   public void Method_RemoveListener<T>( 
        string propertyName, 
        System.EventHandler<MVP.BS_EventArgs<T>> eventHandler) 
   { 
      System.Collections.Generic.Dictionary<string, object> eventsDictionary; 
      MVP.BS_GenericEvent<T> theEvent; 

      if (!this._dictionary.ContainsKey(typeof(T))) 
      { 
          return; 
      } 
   
      eventsDictionary = this._dictionary[typeof(T)]; 
   
      if (!eventsDictionary.ContainsKey(propertyName)) 
      { 
          return; 
      } 
   
      theEvent = eventsDictionary[propertyName] as MVP.BS_GenericEvent<T>; 
      theEvent.OnMyEvent -= eventHandler; 
   } 
//----------------------------------------------------------------------- 
   public void Method_Fire<T>( 
       string propertyName, 
       T requestedValue) 
   { 
      System.Collections.Generic.Dictionary<string, object> eventsDictionary; 
      MVP.BS_GenericEvent<T> theEvent; 

      if (!this._dictionary.ContainsKey(typeof(T))) 
      { 
          return; 
      } 
   
      eventsDictionary = this._dictionary[typeof(T)]; 
   
      if (!eventsDictionary.ContainsKey(propertyName)) 
      { 
          return; 
      } 
   
      theEvent = eventsDictionary[propertyName] as MVP.BS_GenericEvent<T>; 
      theEvent.Method_Fire(this._sender, requestedValue); 
   } 
}