static void Main(string[] args)
        {
            var buffer = new RingBuffer(10);

            var producer = new Task(() => ProducerAction(ref buffer));

            var consumer1 = new Task(() => ConsumerAction(ref buffer, CharType.Digit));

            var consumer2 = new Task(() => ConsumerAction(ref buffer, CharType.Letter));

            var consumer3 = new Task(() => ConsumerAction(ref buffer, CharType.Other));

            producer.Start();
            consumer1.Start();
            consumer2.Start();
            consumer3.Start();


            Task.WaitAll(producer, consumer1, consumer2, consumer3);
            //Console.OutputEncoding = Encoding.UTF8;
            //Console.Write("Вводите символы : ");
        }
        static void ConsumerAction(ref RingBuffer ringBuffer, CharType charType)
        {
            for (; ;)
            {
                ringBuffer.Full.WaitOne();
                ringBuffer.Busy.WaitOne();

                char symbol = ringBuffer.Buffer[ringBuffer.Tail];

                switch (charType)
                {
                case CharType.Letter:
                    if (char.IsLetter(symbol))
                    {
                        ringBuffer.Tail = (ringBuffer.Tail + 1) % ringBuffer.Buffer.Length;

                        Console.ForegroundColor = ConsoleColor.Red;
                        Console.CursorLeft     -= 1;;
                        Console.Write(symbol);
                        Console.ResetColor();

                        ringBuffer.Busy.Release();
                        ringBuffer.Empty.Release();
                    }
                    else
                    {
                        ringBuffer.Full.Release();
                        ringBuffer.Busy.Release();
                    }
                    break;

                case CharType.Digit:
                    if (char.IsDigit(symbol))
                    {
                        ringBuffer.Tail = (ringBuffer.Tail + 1) % ringBuffer.Buffer.Length;

                        Console.ForegroundColor = ConsoleColor.Green;
                        Console.CursorLeft     -= 1;
                        Console.Write(symbol);
                        Console.ResetColor();

                        ringBuffer.Busy.Release();
                        ringBuffer.Empty.Release();
                    }
                    else
                    {
                        ringBuffer.Full.Release();
                        ringBuffer.Busy.Release();
                    }
                    break;

                case CharType.Other:
                    if (!char.IsLetterOrDigit(symbol))
                    {
                        ringBuffer.Tail = (ringBuffer.Tail + 1) % ringBuffer.Buffer.Length;

                        Console.ForegroundColor = ConsoleColor.Blue;
                        Console.CursorLeft     -= 1;
                        Console.Write(symbol);
                        Console.ResetColor();

                        ringBuffer.Busy.Release();
                        ringBuffer.Empty.Release();
                    }
                    else
                    {
                        ringBuffer.Full.Release();
                        ringBuffer.Busy.Release();
                    }
                    break;

                default:
                    break;
                }
            }
        }