An exception of type 'System.FormatException' occurred in mscorlib.dll but was not handled in user code Sqlite in Wpf

I Wonna Use Sqlite In My WPF Project But When i Select The Table It Gives Me This Error:

Blockquote An exception of type 'System.FormatException' occurred in mscorlib.dll but was not handled in user code Additional information: Input string was not in a correct format.

I've Already Imported The Refrences. Every Thing Must Be Fine But It Gives Error On Run.

This is My Code :

string QuerySelect = "select * from TblGroup";
            SQLiteCommand cmd = new SQLiteCommand(QuerySelect, conn);
            SQLiteDataAdapter da = new SQLiteDataAdapter(cmd);
            DataTable dt = new DataTable();
            da.Fill(dt);
            GrdGroup.ItemsSource = dt.DefaultView;