gridview changes height

title says it all, I have a gridview, and the second page does not fill the 10 so it changes height, I need it to stay the same no matter what. I will change to whatever I need to get this done, Ive tried everything I can find online like taking out the height attribute and moving it to css, nothing has worked. I need the gridview to stay the same way , whether that be insert blank rows to make up the space or whatever.

the CSS i tried is:

.RowStyle {

height: 50px;

}

.AlternateRowStyle {

height: 50px;

}

and the HTML I am using currently is:

EnableViewState="False" DataKeyNames="ProjectID" CssClass="mGrid" PagerStyle-CssClass="pgr" RowStyle-CssClass="RowStyle"

AlternatingRowStyle-CssClass="alt" AllowPaging="true" PageSize="10">

ConnectionString="<%$ ConnectionStrings:ProjectsAndTasksTestConnectionString %>"

SelectCommand="SELECT [ProjectID], [ProjectName], [TesterName], [ProjectDescription], [Platform], [DueDate], [DateAssigned], [DocumentName] FROM [Projects] WHERE ([DateCompleted] IS NULL)">