C# slanje između classe i formi

public class MyDataClass
{
    public string Data1 { get; set; }
    public string Data2 { get; set; }
    public string Data3 { get; set; }
    // ...
}

interface INotification
{
    void NotifyDataChanged( MyDataClass data );

    string NotificationName { get; }
}

public class NotificationManager
{
    #region Members

    private static SortedList<string, INotification> _NotificationsList = new SortedList<string, INotification>();

    #endregion

    #region Methods

    public static void Register( INotification notification )
    {
        _NotificationsList.Add( notification.NotificationName, notification );
    }

    public static void Unegister( INotification notification )
    {
        _NotificationsList.Remove( notification.NotificationName );
    }

    public static void NotifyDataChanged( MyDataClass data )
    {
        foreach ( var item in _NotificationsList )
        {
            item.Value.NotifyDataChanged( data );
        }
    }

    #endregion
}

public class MyForm : Form, INotification
{
    #region Events

    private void MyForm_Load( object sender, EventArgs e )
    {
        NotificationManager.Register( this );
    }

    private void MyForm_FormClosed( object sender, FormClosedEventArgs e )
    {
        NotificationManager.Unegister( this );
    }

    #endregion

    #region Methods

    public void NotifyDataChanged( MyDataClass data )
    {
        // ovdje uzimaš podatke koje prosljeđuješ
    }

    #endregion

    #region INotification Members

    public string NotificationName
    {
        get { return this.Name; }
    }

    #endregion
}

Evo jedan primjer kako da to odradiš. U osnovi svaka forma koju imaš neka bude nasljeđena iz INotification i registrirana u NotificationManager.

Podatke koje dobiješ sa servera spremiš u svoju klasu(u ovom primjeri je to MyDataClass) i proslijediš ih kroz NotificationManager.NotifyDataChanged(data);

To je više manje to, ti prilagodi za svoju aplikaciju kako ti odgovara.

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

namespace WindowsFormsApplication1
{
public class MyDataClass
{
public string Data1 { get; set; }
public string Data2 { get; set; }
public string Data3 { get; set; }
}
interface INotification
{
void NotifyDataChanged(MyDataClass data);

string NotificationName { get; }
}

public class NotificationManager
{
#region Members

private static SortedList<string, INotification> _NotificationsList = new SortedList<string, INotification>();

#endregion

#region Methods

public static void Register(INotification notification)
{
_NotificationsList.Add(notification.NotificationName, notification);
}

public static void Unegister(INotification notification)
{
_NotificationsList.Remove(notification.NotificationName);
}

public static void NotifyDataChanged(MyDataClass data)
{
foreach (var item in _NotificationsList)
{
item.Value.NotifyDataChanged(data);
}
}

#endregion
}
}

nakon što sam unjeo tvoj kod i pokušao ga kompajlati izbaci mi dvije greške :( , pokušao sam u visual c 2010 
Error 1 Inconsistent accessibility: parameter type 'WindowsFormsApplication1.INotification' is less accessible than method 'WindowsFormsApplication1.NotificationManager.Register(WindowsFormsApplication1.INotification)'

  Error 2 Inconsistent accessibility: parameter type 'WindowsFormsApplication1.INotification' is less accessible than method 'WindowsFormsApplication1.NotificationManager.Unegister(WindowsFormsApplication1.INotification)'