How to load the file from form2 back to form1

I have two forms. Now i am trying to read the file from form2 and load it back to the main form which is form1. i will be loading it to the drivdiew.

form1(main form contains) -loadbutton > when you click loadbutton it opens form2 -datagriview > the file will be loaded here on the grid

form2(second form contains) -textbox > will disply the path -browserbutton > will use to browser the file and read the file -finish button > it must close form2 and open form1 with loaded file into the datagridview.

form1

    private void btnBrowse1_Click(object sender, EventArgs e)
    {
           BrowseFile();
           cboLanguage.Enabled = true;
           btnNewfile.Enabled = true;
           ReadFile(ref Gridview_Input, ref txtInputfile, ref cboLanguage, ref btnNewfile);
       }

    private void ReadFile(ref DataGridView _Grid, ref TextBox _InputTexBox, ref ComboBox _cboLanguage, ref  Button _btnNew)
    {
        string PathSelection = "";
        if (_InputTexBox.Text.Length > 0)
        {
            PathSelection = _InputTexBox.Text;
        }
        oDataSet = new DataSet();
        XmlReadMode omode = oDataSet.ReadXml(PathSelection); 

        for (int i = 0; i < oDataSet.Tables[2].Rows.Count; i++)
        {
            string comment = oDataSet.Tables["data"].Rows[i][2].ToString();
            string font = Between(comment, "[Font]", "[/Font]");
            string datestamp = Between(comment, "[DateStamp]", "[/DateStamp]");
            string commentVal = Between(comment, "[Comment]", "[/Comment]");
            string[] row = new string[] { oDataSet.Tables["data"].Rows[i][0].ToString(), oDataSet.Tables["data"].Rows[i][1].ToString(), font, datestamp, commentVal };
            _Grid.Rows.Add(row);
        }
    }