internal static void Check(SQLiteConnection connection)
{
if (connection == null)
throw new ArgumentNullException("connection");
connection.CheckDisposed();
if (connection._connectionState != ConnectionState.Open)
throw new InvalidOperationException("The connection is not open.");
SQLite3 sql = connection._sql as SQLite3;
if (sql == null)
throw new InvalidOperationException("The connection handle wrapper is null.");
SQLiteConnectionHandle handle = sql._sql;
if (handle == null)
throw new InvalidOperationException("The connection handle is null.");
if (handle.IsInvalid)
throw new InvalidOperationException("The connection handle is invalid.");
if (handle.IsClosed)
throw new InvalidOperationException("The connection handle is closed.");
}