public void Sys_foreign_keys_null()
{
foreign_keys f = new foreign_keys();
List<foreign_keys> fl = f.ToList;
Assert.AreEqual<List<foreign_keys>>(fl, null);
}
public void Sys_foreign_keys()
{
foreign_keys f = new foreign_keys(connStr);
List<foreign_keys> fl = f.ToList;
Assert.AreNotEqual<List<foreign_keys>>(fl, null);
}