public void Disconnect()
{
if ((this.connectionPoint != null) && (this.cookie != 0))
{
try
{
this.connectionPoint.Unadvise(this.cookie);
}
catch (Exception exception)
{
if (System.Windows.Forms.ClientUtils.IsCriticalException(exception))
{
throw;
}
}
finally
{
this.cookie = 0;
}
try
{
Marshal.ReleaseComObject(this.connectionPoint);
}
catch (Exception exception2)
{
if (System.Windows.Forms.ClientUtils.IsCriticalException(exception2))
{
throw;
}
}
finally
{
this.connectionPoint = null;
}
}
}
internal ConnectionPointCookie(object source, object sink, System.Type eventInterface, bool throwException)
{
if (source is System.Windows.Forms.UnsafeNativeMethods.IConnectionPointContainer)
{
System.Windows.Forms.UnsafeNativeMethods.IConnectionPointContainer container = (System.Windows.Forms.UnsafeNativeMethods.IConnectionPointContainer) source;
try
{
Guid gUID = eventInterface.GUID;
if (container.FindConnectionPoint(ref gUID, out this.connectionPoint) != 0)
{
this.connectionPoint = null;
}
}
catch
{
this.connectionPoint = null;
}
if (this.connectionPoint != null)
{
if ((sink != null) && eventInterface.IsInstanceOfType(sink))
{
int num = this.connectionPoint.Advise(sink, ref this.cookie);
if (num != 0)
{
this.cookie = 0;
Marshal.ReleaseComObject(this.connectionPoint);
this.connectionPoint = null;
if (throwException)
{
throw new InvalidOperationException(string.Format(CultureInfo.CurrentCulture, System.Windows.Forms.SR.GetString("AXNoSinkAdvise", new object[] { eventInterface.Name }), new object[] { num }));
}
}
else
{
this.threadId = Thread.CurrentThread.ManagedThreadId;
}
}
else if (throwException)
{
throw new InvalidCastException(System.Windows.Forms.SR.GetString("AXNoSinkImplementation", new object[] { eventInterface.Name }));
}
}
else if (throwException)
{
throw new ArgumentException(System.Windows.Forms.SR.GetString("AXNoEventInterface", new object[] { eventInterface.Name }));
}
}
else if (throwException)
{
throw new InvalidCastException(System.Windows.Forms.SR.GetString("AXNoConnectionPointContainer"));
}
if ((this.connectionPoint == null) || (this.cookie == 0))
{
if (this.connectionPoint != null)
{
Marshal.ReleaseComObject(this.connectionPoint);
}
if (throwException)
{
throw new ArgumentException(System.Windows.Forms.SR.GetString("AXNoConnectionPoint", new object[] { eventInterface.Name }));
}
}
}
