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public PersistentChatEndpoint(
	Uri groupChatServerAddress,
	LocalEndpoint ocs
)

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private void MyMethod() {

//do some stuff
var flow = GetFlowFromSomewhere();
var message = GetMessageFromSomewhere();

flow.BeginSendInstantMessage(message, EndBeginSendInstanceMessage, flow);

//do some other things....
}

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private void MyMethod() {
 
//do some stuff
var flow = GetFlowFromSomewhere();
var message = GetMessageFromSomewhere();
 
flow.BeginSendInstantMessage(message, result => 
        {
          try
          {

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private void MyMethod()
{

await CallLongRunningTaskAsync();

//this code runs AFTER the task has completed;

}

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public static Task SendMessageAsync(this InstantMessagingFlow flow, IMessage message)
        {
            return Task.Factory.FromAsync(flow.BeginSendMessage, 
                flow.EndSendMessage, message, null);
        }

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public void MyMethod()
{
        flow.EndSendMessage(flow.BeginSendMessage,null,null);
}

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using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Microsoft.Lync.Model;

namespace DesktopDevDemo
{
    class Program
    {

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Function Populate-UserObject($UserArg)
{
$thisUser = new-Object($t + ".User")
$thisUser.Name = $UserArg.Name
$thisUser.Email = $UserArg.EmailAddress
$thisUser.ID = $UserArg.Guid
$innerObject = $UserArg.GetUnderlyingObject()
$thisUser.SIP = $innerObject."msRTCSIP-PrimaryUserAddress"
return $thisUser
}

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$Request = New-Object System.DirectoryServices.Protocols.SearchRequest
$Request.DistinguishedName =  $RootContainer
$Request.Filter = $SearchFilter
$Request.Scope = "Subtree"

$Request.Attributes.Add("distinguishedName") | Out-Null
$Request.Attributes.Add("objectclass") | Out-Null
$Request.Attributes.Add("mail") | Out-Null
$Request.Attributes.Add("objectguid") | Out-Null
$Request.Attributes.Add("msrtcsip-primaryhomeserver") | Out-Null

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Function Get-UserPrincipal($userName)
{
 $dsam = "System.DirectoryServices.AccountManagement" 
 $rtn = [reflection.assembly]::LoadWithPartialName($dsam)
 $cType = "domain" #context type
 $iType = "DistinguishedName"
 $dsamUserPrincipal = "$dsam.userPrincipal" -as [type]
 $principalContext = new-object "$dsam.PrincipalContext"($cType,$RootDomain)
 Write-Host Looking for DN $UserName in Container $principalContext.Name