C#

<code>
FileInfo fi = new FileInfo(@"Your_File_Path_Goes_Here.txt");
if(fi.Eists)
{...}
else
{//cannot find file}
</code>

int rowNumber = 3;<br />
            int cellNumber = 2;<br />
<br />
            bool b = (bool)dataGridView1.Rows[rowNumber].Cells[cellNumber].Value;

            int rowNumber = 3;<br />
            int cellNumber = 2;<br />
<br />
            bool b = false;<br />
            if (dataGridView1.Rows[rowNumber].Cells[cellNumber].Value != null)<br />
            {<br />
                b = (bool)dataGridView1.Rows[rowNumber].Cells[cellNumber].Value;<br />
            }<br />