using System.Data.OleDb;

private void btnsabt_Click(object sender, EventArgs e)
    {
     OleDbConnection con = new OleDbConnection();
     con.ConnectionString = "provider=Microsoft.ace.oledb.12.0;Data source=نام جدول.accdb";
     con.Open();
     OleDbCommand com = new OleDbCommand();
     com.CommandText = "delete form نام جدول where شرط ";
     com.Connection = con;
     com.ExecuteNonQuery();
     con.Close();
        
        }