void InitializeAndFindAsync()
{
DiscoveryEndpoint discoveryEndpoint = this.discoveryEndpointProvider.GetDiscoveryEndpoint();
if (discoveryEndpoint == null)
{
throw FxTrace.Exception.AsError(
new InvalidOperationException(
SR.DiscoveryMethodImplementationReturnsNull("GetDiscoveryEndpoint", this.discoveryEndpointProvider.GetType())));
}
this.discoveryClient = new DiscoveryClient(discoveryEndpoint);
this.discoveryClient.FindProgressChanged += new EventHandler <FindProgressChangedEventArgs>(OnFindProgressChanged);
this.discoveryClient.FindCompleted += new EventHandler <FindCompletedEventArgs>(OnFindCompleted);
SynchronizationContext originalSynchronizationContext = SynchronizationContext.Current;
if (originalSynchronizationContext != null)
{
SynchronizationContext.SetSynchronizationContext(null);
if (TD.SynchronizationContextSetToNullIsEnabled())
{
TD.SynchronizationContextSetToNull();
}
}
try
{
// AsyncOperation uses the SynchronizationContext set during its
// initialization to Post the FindProgressed and FindProgressCompleted
// events. Hence even if the async operation does not complete
// synchronously, the right SynchronizationContext will be used by
// AsyncOperation.
this.discoveryClient.FindAsync(this.findCriteria, this);
}
finally
{
if (originalSynchronizationContext != null)
{
SynchronizationContext.SetSynchronizationContext(originalSynchronizationContext);
if (TD.SynchronizationContextResetIsEnabled())
{
TD.SynchronizationContextReset(originalSynchronizationContext.GetType().ToString());
}
}
}
if (TD.FindInitiatedInDiscoveryClientChannelIsEnabled())
{
TD.FindInitiatedInDiscoveryClientChannel();
}
}