How to enable default scope for Webpart as Shared?

Question

We can enable Shared PersonalizationScope on runtime for Webpart manager using following codebehind code:

if ((webpartManagerId.Personalization.Scope == PersonalizationScope.User) && (webpartManagerId.Personalization.CanEnterSharedScope))
{
    webpartManagerId.Personalization.Scope = PersonalizationScope.Shared;
}

I need to do this on all pages. But doing this will again reload the Page to make the webpart in Shared Scope and will break other things and cause the page loading slow.

Is there any config settings, by which I can make all pages/Webpartmanagers to go in Shared scope as default?

Answer 1

Finally, I got it working to make the default scope as Shared. Rather then using System.Web.UI.WebControls.WebParts.WebPartManager control in .aspx page directly. Inherit this control and set the default value in consturcted to save loading time:

public class CustomWebPartManager : WebPartManager
{
    public CustomWebPartManager()
    {
       Personalization.InitialScope =  PersonalizationScope.Shared;
    }
}