Why Is My Code Not Working Everytime I Run This And Press Submit,There's A Message In Cmd.Exeutenonquery Saying Sqlexception Was Unhandled Please Help

I added the try block code and it still shows the same error

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.Data.SqlClient;

namespace Attendance
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}

private void SignButton_Click(object sender, EventArgs e)
{
try
{
SqlConnection con = new SqlConnection("Data Source=(localdb)\\Projects;Initial Catalog=MyDatabase;Integrated Security=True;");
con.Open();
SqlCommand cmd = new SqlCommand("INSERT INTO User(Username,Password,Firstname,MiddleInitial,Lastname,Age,Phone,Address,City,State,Email) VALUES(@user,@pass,@first,@middle,@last,@age,@phone,@add,@city,@state,@email)",con);


cmd.Parameters.AddWithValue("@user", UsernameTB.Text);
cmd.Parameters.AddWithValue("@pass", PasswordTB.Text);
cmd.Parameters.AddWithValue("@first", FirstnameTB.Text);
cmd.Parameters.AddWithValue("@middle", MiddleTB.Text);
cmd.Parameters.AddWithValue("@last", LastnameTB.Text);
cmd.Parameters.AddWithValue("@age", AgeTB.Text);
cmd.Parameters.AddWithValue("@phone", PhoneTB.Text);
cmd.Parameters.AddWithValue("@add", AddressTB.Text);
cmd.Parameters.AddWithValue("@city", CityTB.Text);
cmd.Parameters.AddWithValue("@state", StateTB.Text);
cmd.Parameters.AddWithValue("@email", EmailTB.Text);

cmd.ExecuteNonQuery();
MessageBox.Show("Record has been inserted");
con.Close();
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}

}

}
}