getting error while storing date into database in vs2013

DateTime dt = DateTime.Parse(dateofbirth.Text, DateTimeFormatInfo.InvariantInfo);

//Passing dt to query

string Storedata = "Insert Into STUDENT_DETAILS (UNIQUEID, GRNO, FULLNAME, DOB, DOBINWORDS, STD, DIV, BIRTHPLACE, CASTRELIGION, MONO, STUDENTADDRESS, GENDER, MEDIUM, STUDENTPIC) Values ('"+STUDENT_ID.Text+"','"+GRNO.Text+"','"+fullname.Text+"','"+ dt+"','"+ DOBINWORDSTXT.Text +"','"+std.Text+"','"+division.Text+"','"+birthplace.Text+"','"+castreligion.Text+"','"+mono.Text+"','"+studentaddress.Text+"','"+Gender+"','"+Medium+"',@IMG)";

//passing dt here

cmd.Parameters.AddWithValue("@DOB", dt);

try

{

SqlConnection conn = new SqlConnection(@"Data Source=DIVYANSHI-PC\DEVINE;Initial Catalog=SMS;Integrated Security=True");

string Storedata = "Insert Into STUDENT_DETAILS (UNIQUEID, GRNO, FULLNAME, DOB, DOBINWORDS, STD, DIV, BIRTHPLACE, CASTRELIGION, MONO, STUDENTADDRESS, GENDER, MEDIUM, STUDENTPIC) Values ('"+STUDENT_ID.Text+"','"+GRNO.Text+"','"+fullname.Text+"','"+ DateTime.Parse(dateofbirth.Text).ToString("dd/MM/yyyy")+"','"+DOBINWORDSTXT.Text+"','"+std.Text+"','"+division.Text+"','"+birthplace.Text+"','"+castreligion.Text+"','"+mono.Text+"','"+studentaddress.Text+"','"+Gender+"','"+Medium+"',@IMG)";

// string insertquery = "Insert into STUDENT_DETAILS (UNIQUEID,GRNO,FULLNAME,DOB,DOBINWORDS,STD,DIV,BIRTHPLACE,CASTRELIGION,MONO,STUDENTADDRESS,GENDER,MEDIUM,STUDENTPIC)Values('" + STUDENT_ID.Text + "','" + GRNO.Text + "','" + fullname.Text + "','" +dateofbirth.Text + "','"+DOBINWORDSTXT.Text+"','" + std.Text + "','" + division.Text + "','" + birthplace.Text + "','" + castreligion.Text + "','"+mono.Text+"','"+studentaddress.Text+"','" + Gender + "'," + Medium + ",@IMG)";

// string insertquery = "Insert Into STUDENT_DETAILS Values (@UNIQUEID, @GRNO,@FULLNAME,@DOB,@DOBINWORDS,@STD,@DIV,@BIRTHPLACE,@CASTRELIGION,@MONO,@STUDENTADDRESS,@GENDER,@MEDIUM,@IMG)";

SqlCommand cmd = new SqlCommand(Storedata, conn);

cmd.Parameters.AddWithValue("@UNIQUEID", STUDENT_ID.Text);

cmd.Parameters.AddWithValue("@GRNO", GRNO.Text);

cmd.Parameters.AddWithValue("@FULLNAME", fullname.Text);

cmd.Parameters.AddWithValue("@DOB", DateTime.Parse(dateofbirth.Text).ToString("dd/MM/yyyy"));

cmd.Parameters.AddWithValue("@DOBINWORDS", DOBINWORDSTXT.Text);

cmd.Parameters.AddWithValue("@STD", std.Text);

cmd.Parameters.AddWithValue("@DIV", division.Text);

cmd.Parameters.AddWithValue("@BIRTHPLACE", birthplace.Text);

cmd.Parameters.AddWithValue("@CASTRELIGION", castreligion.Text);

cmd.Parameters.AddWithValue("@MONO", mono.Text);

cmd.Parameters.AddWithValue("@STUDENTADDRESS", studentaddress.Text);

cmd.Parameters.AddWithValue("@GENDER", Gender);

cmd.Parameters.AddWithValue("@MEDIUM", Medium);

cmd.Parameters.AddWithValue("@IMG", SAVEPHOTO());

conn.Open();

int a = cmd.ExecuteNonQuery();

if (a > 0)

{

DialogResult dr = MessageBox.Show("Save Record ?" + fullname.Text, "Save?", MessageBoxButtons.YesNo, MessageBoxIcon.Warning);

if (dr == DialogResult.Yes)

{

MessageBox.Show("Record Has Been Saved", "Saved", MessageBoxButtons.OK, MessageBoxIcon.Information);

ClearRecord();

}

else if (dr == DialogResult.No)

{

return;

}

}

conn.Close();

}

catch (Exception EC)

{

MessageBox.Show(EC.Message);

}

finally

{

}