Aldığım hata : Argument 2: cannot convert from 'System.Data.SqlClient.SqlConnection' to 'System.Data.SqlClient.SqlCrediental' hatası

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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;
using static System.Data.SqlClient.SqlCredential;
namespace WindowsFormsApplication82
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
SqlConnection baglanti = new SqlConnection("Data Source=msi\\SQLEXPRESS;Initial Catalog=SirketPersonelVeriTabani;Integrated Security=True");
private void Form1_Load(object sender, EventArgs e)
{
this.sirketTablosuTableAdapter.Fill(this.sirketPersonelVeriTabaniDataSet.SirketTablosu);
}
private void btnListele_Click(object sender, EventArgs e)
{
this.sirketTablosuTableAdapter.Fill(this.sirketPersonelVeriTabaniDataSet.SirketTablosu);
}
private void btnKaydet_Click(object sender, EventArgs e)
{
baglanti.Open();
SqlConnection komut = new SqlConnection("insert into SirketTablosu (PerAd,PerSoyad) values (@p1,@p2)", baglanti);
baglanti.Close();
}
}
} 
using System.Data; using System.Data.SqlClient;olanlar kalsın.