In my previous post I wrote about using IgnoreIfAlreadyExists=“True” for preventing of adding webparts multiple times. It works fine until you redeploy your project. Another approach is to use a user control with you webpart. Add mapped folder CONTROLTEMPLATES. Create a new user control, add you assembly and your webpart. Then you can add this user control wherever you need it.

<%@ Register 
    tagprefix="SPSWC" 
    Namespace="Microsoft.SharePoint.Portal.WebControls" 
    Assembly="Microsoft.SharePoint.Portal, Version=14.0.0.0, 
    Culture=neutral, PublicKeyToken=71e9bce111e9429c" %>

<SPSWC:SocialCommentWebPart runat="server" 
AllowEdit="True" 
AllowConnect="True" 
ConnectionID="00000000-0000-0000-0000-000000000000" 
Title="Note Board" 
IsIncluded="True" 
Dir="Default" 
PartImageLarge="" 
IsVisible="True" 
AllowMinimize="True" 
ZoneID="" 
ID="g\_5937b022\_83bb\_40cb\_b68f\_bd565bf96885" 
FrameState="Normal" 
ExportMode="All" 
TitleLocIdNum="0" 
AllowHide="True" 
SuppressWebPartChrome="False"
 DetailLink="" 
 ChromeType="None" 
 DescriptionLocId="Null" 
 TitleLocId="Null" 
 MissingAssembly="Cannot import this Web Part." 
 PartImageSmall="" 
 AllowRemove="True" 
 HelpMode="Modeless" 
 FrameType="None" 
 AllowZoneChange="True" 
 PartOrder="1" 
 Description="Enable users to leave short, publicly-viewable notes about this page." 
 HelpLink="" 
 DescriptionLocIdNum="0" 
 ExportControlledProperties="True" 
 IsIncludedFilter="" 
 \_\_MarkupType="vsattributemarkup" 
 \_\_WebPartId="{5937b022-83bb-40cb-b68f-bd565bf96885}" 
 WebPart="true" 
 Height="" 
 Width="">
 </SPSWC:SocialCommentWebPart>
```Then add your user control into page layout like this:

<%@ Register     Tagprefix=“CONTOSO”     TagName=“SocialComment”     Src="~/_CONTROLTEMPLATES/CONTOSO/SocialCommentUserControl.ascx" %> <CONTOSO:SocialComment id=“SocialComment” runat=“server” />