C#

private void FindKey_Load(object sender, EventArgs e)
       {
           SqlCommand command;
           DataTable dt;
           try
           {
               SqlConnection con = new SqlConnection("Data Source=.\\SQLEXPRESS;AttachDbFilename=|DataDirectory|\\KeyStore.mdf;Integrated Security=True;User Instance=True");
           }
           catch (Exception ex)
           {
               MessageBox.Show("Error: " + ex);
           }

           //Open the Connection

           try
           {
               con.Open();
           }
           catch (Exception ex)
           {
               MessageBox.Show("Error: " + ex);
           }

           // Query The Database
           try
           {
               command = new SqlCommand("SELECT * FROM Key", con);
           }
           catch (Exception ex)
           {
               MessageBox.Show("Error: " + ex);
               command = new SqlCommand("SELECT * FROM Key", con);
           }

           try
           {
               dt = new DataTable();
           }
           catch (Exception ex)
           {
               MessageBox.Show("Error: " + ex);
               dt = new DataTable();
           }

           try
           {
               SqlDataAdapter da = new SqlDataAdapter(command);
           }
           catch (Exception ex)
           {
               MessageBox.Show("Error: " + ex);
           }

           // Fill the Result In DataTable
           try
           {
               da.Fill(dt);
           }
           catch (Exception ex)
           {
              MessageBox.Show("Error: " + ex);
           }

           //Show it in the list
           try
           {
               for (int i = 0; i < dt.Rows.Count; i++)
               {
                   DataRow dRow = dt.Rows[i];
                   FoundKey newkey = new FoundKey(dRow);
                   lstMatchedKeys.Items.Add(newkey);
               }
           }
           catch (Exception ex)
           {
               MessageBox.Show("Error: " + ex);
           }
               //Close the Connection
           try
           {
               con.Close();
           }
           catch (Exception ex)
           {
               MessageBox.Show("Error: " + ex);
           }

       }