My C# application automatically closed

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C#

MS-Access

database

forms

C#6.0

Hello Guys am working on my c# application in my application i have itemreport form and when i open my itemreport form on onload so my application automatically closed without any errors please help me how can i solve it whats the error please

What I have tried:

private void ItemReport_Load(object sender, EventArgs e)
{
dateTimePicker1.Text = System.DateTime.Now.AddDays(-1).ToShortDateString();
con_string.Open();
DataSet dsa = new DataSet();
DataTable dt1 = new DataTable();
dsa.Tables.Add(dt1);
OleDbDataAdapter da = new OleDbDataAdapter();
da = new OleDbDataAdapter("SELECT [column2] As [ItemName],count(column2) As [QTY] from [Total] Where [Date] between #" + dateTimePicker1.Value + "# AND #" + dateTimePicker2.Value + "# Group By [column2]", con_string);
da.Fill(dt1);
dataGridView1.DataSource = dt1;
con_string.Close();
}