Pass Standard Information Between Masters / Pages In Code Behind?

I need my child pages to be able to set the values of certain properties of the Master page before loading. In other words, how my application builds the Master page for the client depends upon what properties are set by the child pages on the back-end. For example:

public partial class mstrPage : System.Web.UI.MasterPage
{
public int Rows { get; set; }
public int Cols { get; set; }
protected void Page_Load(object sender, EventArgs e)
{
/* Build a .NET two-dimensional-array of divs
that is <Rows> tall and <Cols> wide. */
}
}

In this example, the child page needs to set the values of <Rows> and <Cols> before Page_Load() is invoked for the Master. This is fairly simple to accomplish with inheritance in OOP, but ASP.NET web pages do not "inherit" their master pages in the code-behind. In the given example, what would the code-behind look like for the ASP.NET child page that sets these properties?