System.Globalization.Calendar.SetReadOnlyState C# (CSharp) Method

        internal void SetReadOnlyState(bool readOnly)
        {
            m_isReadOnly = readOnly;
        }

        internal static Calendar ReadOnly(Calendar calendar)
        {
            if (calendar == null) { throw new ArgumentNullException("calendar"); }
            Contract.EndContractBlock();
            if (calendar.IsReadOnly) { return (calendar); }

            Calendar clonedCalendar = (Calendar)(calendar.MemberwiseClone());
            clonedCalendar.SetReadOnlyState(true);

            return (clonedCalendar);
        }