My first row check box is returning false even I checked in my datagridview

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C#3.5

hi, when i added rows into a grid view with 4 columsn
1 is Check box,
and remaining are text columns
after all the rows are added, when i checked the first row check box and click on a button to run the process, the first row check box returns false value, even i checked.
the following code i have tried to add the data into the grid.

please help me to solve the issue.

What I have tried:

foreach (DataRow fdr in getmydata.ListFiles().Rows)
            {
                object[] obj = { false, fdr["File Name"].ToString(), fdr["Size"].ToString(), fdr["Attributes"].ToString() };
                Dgv_Grid.Rows.Add(obj);
            }