Attribute 'DisplayTitle' is not a valid attribute of element 'WebPartZone'

Question

I have a Microsoft.SharePoint.WebPartPages.WebPartZone declared on an application page:

<%@ Register TagPrefix="WebPartPages" Namespace="Microsoft.SharePoint.WebPartPages"
    Assembly="Microsoft.SharePoint, Version=14.0.0.0, Culture=neutral, PublicKeyToken=71e9bce111e9429c" %>

<WebPartPages:WebPartZone ID="Foo" runat="server" DisplayTitle="Bar">
</WebPartPages:WebPartZone>

Visual Studio 2010 displays the following warning "Message" in the Error List window:

Validation (ASP.Net): Attribute 'DisplayTitle' is not a valid attribute of element 'WebPartZone'.

Even though it is: WebPartZone.DisplayTitle Property

Has anyone ever had to fix this? There's one of these messages for every page in my project (but only when I have the markup open)...

Answer 1

As you can see on your link, DisplayTitle is Read-only, (get only).

Use HeaderText to change the title