برای بازیابی از کد زیر استفاده کن
String s = "School";
SqlConnection sq = new SqlConnection("server=(local);database=School;inte grated security=true;");
OpenFileDialog ofd = new OpenFileDialog();
ofd.Filter = "*.bak|*.bak";
if (ofd.ShowDialog() == DialogResult.OK)
{
string query = "USE [master]; RESTORE DATABASE [" + s + "] FROM DISK = N'" +ofd.FileName + " ' WITH FILE = 1, NOUNLOAD, REPLACE, STATS = 10";
SqlCommand com = new SqlCommand(query, sq);
sq.Open();
com.ExecuteNonQuery();
sq.Close();
}//if
school همان نام پایگاه شماست