Name of the button column in dataGridView

Here I have two button column named Edit and Delete. To get the column's name, do the following steps. 

Step 1: Select the dataGridView and click on the arrow sign.

Step 2: Select the Edit Columns option.

Step 3: On the left side, a list of column's header will be shown of the dataGridView. To change the properties of Edit Column select Edit. On the right side, it's properties will be shown. The Name under Design section indicates the name of the Edit column.