Forms Data Controls :: How To Get The Value Of GridView Caption In The Code Behind

I have a button_Click action and inside that I want to read the value of Caption of Gridview.

I am able to read the Cell values but how to read the caption value?

protected void Button1_Click(object sender, EventArgs e)
{
foreach (GridViewRow gvrow in GridView1.Rows)
{
string abc = gvrow.Cells[0].Text.ToString();
// This is how I am reading the cell values which works fine.
// HOW TO READ THE CAPTION VALUE HERE?
}
|}
<GridView id="GridView1" runat="server caption="Want to Read this value in Code Behind">
// columns here.
</GridView>