I'm fairly new to c# and Visual Studio.  I've been having what seems like a
common paging problem.  When I try to change pages (even just from the first
page to the second), the error comes up:

       Invalid CurrentPageIndex value. It must be >= 0 and < the PageCount.

I have found many solutions on different websites, but they all have to do
with deleting entries on a page and then trying to use a CurrentPageIndex
larger than the PageCount.  However, I have checked both of these variables
and they should be fine.  I even added an if statement to guard against it
and the error still comes up.  

        DataGrid1.CurrentPageIndex = e.NewPageIndex;
        if (DataGrid1.CurrentPageIndex >= 0 && DataGrid1.CurrentPageIndex <
DataGrid1.PageCount)
        {
    DataGrid1.DataBind();
        }

If there is anyone who can give me any idea where to start to fix this
problem, I would greatly appriciate it.