I'm trying to make a grid based on a UniformGrid to show the coordinates of each cell, and I want to show the values on the X and Y axes like so:

   _A_ _B_ _C_ _D_
1 |___|___|___|___|
2 |___|___|___|___|
3 |___|___|___|___|
4 |___|___|___|___|

Anyway, in order to do that I need to know the number of columns and rows in the Uniform grid, and I tried overriding the 3 most basic methods where the arrangement / drawing happens, but the columns and rows in there are 0, even though I have some controls in my grid. What method can I override so my Cartesian grid knows how many columns and rows it has?

C#:

public class CartesianGrid : UniformGrid
{
    protected override Size MeasureOverride(Size constraint)
    {
        Size size = base.MeasureOverride(constraint);

        int computedColumns = this.Columns; // always 0
        int computedRows = this.Rows; // always 0

        return size;
    }

    protected override Size ArrangeOverride(Size arrangeSize)
    {
        Size size = base.ArrangeOverride(arrangeSize);

        int computedColumns = this.Columns; // always 0
        int computedRows = this.Rows; // always 0

        return size;
    }

    protected override void OnRender(DrawingContext dc)
    {
        int computedColumns = this.Columns; // always 0
        int computedRows = this.Rows; // always 0

        base.OnRender(dc);
    }
}

XAML:

<local:CartesianGrid>
    <Label Content="Hello" />
    <Label Content="Hello" />
    <Label Content="Hello" />
    <Label Content="Hello" />
    <Label Content="Hello" />
    <Label Content="Hello" />
</local:CartesianGrid>

Any help is greatly appreciated. Thanks!