'TextBox' cannot have children of type 'DataBoundLiteralControl'.

From what I've seen this particular error is already pretty well documented, however it is one of the things that Visual Studio is a little misleading about.

Seems this is a lesson why you can't always rely on intellisense to tell you what to type. In a datagrid, the following code will error:

Error:

<EDITITEMTEMPLATE>
<asp:TextBox id=TextBox1 runat="server">
  <%# TimeZoneInformation.ToLocalShortDateString(
    (DateTime)DataBinder.Eval(Container.DataItem, "FromDate")) %>
</asp:TextBox>
</EDITITEMTEMPLATE>

This will land you with a "'TextBox' cannot have children of type 'DataBoundLiteralControl'." error.

Solution.

<EDITITEMTEMPLATE>
<asp:TextBox id="TextBox1" runat="server" 
value='<%# TimeZoneInformation.ToLocalShortDateString(
    (DateTime)DataBinder.Eval(Container.DataItem, "FromDate")) %>'>
</asp:TextBox>
</EditItemTemplate>

In this case the "value" tag is valid, even though intellisense doesn't think so.