Arithmetica.MathExpressionContext.Forget C# (CSharp) Метод

        public void Forget(string variable)
        {
            try
            {
                _lock.EnterWriteLock();

                if (_lookup.ContainsKey(variable))
                {
                    _lookup.Remove(variable);
                }
            }
            finally
            {
                _lock.ExitWriteLock();
            }
        }