Entering the date in the console application

It all depends on your requirements, if simple manual input is enough, you can use one of the answers sent earlier.

If you are implementing a console GUI, you can think of something like this:

 class ConsoleDatePicker { public int Left { get; set; } public int Top { get; set; } public DateTime SelectedDate { get; set; } public ConsoleDatePicker(int left, int top) { Left = left; Top = top; SelectedDate = DateTime.Today; } public ConsoleDatePicker() : this(0, 0) { } string[] months = { "янв", "фев", "мар", "апр", "май", "июн", "июл", "авг", "сен", "окт", "ноя", "дек" }; public void Show() { int oldLeft = Console.CursorLeft, oldTop = Console.CursorTop; ShowFrame(); ShowMonth(); ShowCursor(); Console.SetCursorPosition(oldLeft, oldTop); } void ShowFrame() { Console.SetCursorPosition(Left, Top); Console.Write("╔══════════════════════╗"); Console.SetCursorPosition(Left, Top + 1); Console.Write("║ ║"); Console.SetCursorPosition(Left, Top + 2); Console.Write("╟──────────────────────╢"); for (int topAdd = 3; topAdd <= 15; ++topAdd) { Console.SetCursorPosition(Left, Top + topAdd); Console.Write("║ ║"); } Console.SetCursorPosition(Left, Top + 16); Console.Write("╚══════════════════════╝"); } void ShowMonth() { Console.SetCursorPosition(Left, Top + 1); Console.Write($"║ {months[SelectedDate.Month - 1]} {SelectedDate.Year:0000} ║"); string[,] days = new string[6, 7]; int week = 0; int dayOfWeek = (int)FirstDayOfMonth(SelectedDate).DayOfWeek - 1; if (dayOfWeek == -1) dayOfWeek = 6; int daysInMonth = LastDayOfMonth(SelectedDate).Day; for (int day = 1; day <= daysInMonth; ++day) { days[week, dayOfWeek] = $"{day,2}"; ++dayOfWeek; if (dayOfWeek == 7) { ++week; dayOfWeek = 0; } } for (int row = 0; row < 6; ++row) for (int column = 0; column < 7; ++column) { Console.SetCursorPosition(Left + 2 + column * 3, Top + 4 + row * 2); Console.Write(days[row, column] ?? " "); } } void ShowCursor() { int column = (int)SelectedDate.DayOfWeek - 1; if (column == -1) column = 6; int row = (SelectedDate.Day + (int)FirstDayOfMonth(SelectedDate).DayOfWeek - 2) / 7; Console.SetCursorPosition(Left + 1 + column * 3, Top + 3 + row * 2); Console.Write("┌──┐"); Console.SetCursorPosition(Left + 1 + column * 3, Top + 4 + row * 2); Console.Write("│"); Console.SetCursorPosition(Left + 4 + column * 3, Top + 4 + row * 2); Console.Write("│"); Console.SetCursorPosition(Left + 1 + column * 3, Top + 5 + row * 2); Console.Write("└──┘"); } void EraseCursor() { int column = (int)SelectedDate.DayOfWeek - 1; if (column == -1) column = 6; int row = (SelectedDate.Day + (int)FirstDayOfMonth(SelectedDate).DayOfWeek - 2) / 7; Console.SetCursorPosition(Left + 1 + column * 3, Top + 3 + row * 2); Console.Write(" "); Console.SetCursorPosition(Left + 1 + column * 3, Top + 4 + row * 2); Console.Write(" "); Console.SetCursorPosition(Left + 4 + column * 3, Top + 4 + row * 2); Console.Write(" "); Console.SetCursorPosition(Left + 1 + column * 3, Top + 5 + row * 2); Console.Write(" "); } DateTime FirstDayOfMonth(DateTime date) { return new DateTime(date.Year, date.Month, 1); } DateTime LastDayOfMonth(DateTime date) { return FirstDayOfMonth(date.AddMonths(1)).AddDays(-1); } public DateTime GetDate() { int oldLeft = Console.CursorLeft, oldTop = Console.CursorTop; bool cursorVisible = Console.CursorVisible; Console.CursorVisible = false; ConsoleKeyInfo key; do { Console.SetCursorPosition(oldLeft, oldTop); key = Console.ReadKey(); DateTime newDate = SelectedDate; if (key.Key == ConsoleKey.RightArrow) newDate = SelectedDate.AddDays(1); if (key.Key == ConsoleKey.LeftArrow) newDate = SelectedDate.AddDays(-1); if (key.Key == ConsoleKey.DownArrow) newDate = SelectedDate.AddDays(7); if (key.Key == ConsoleKey.UpArrow) newDate = SelectedDate.AddDays(-7); if (newDate != SelectedDate) { EraseCursor(); bool changeMonth = newDate.Month != SelectedDate.Month; SelectedDate = newDate; if (changeMonth) ShowMonth(); ShowCursor(); } } while (key.Key != ConsoleKey.Enter); Console.CursorVisible = cursorVisible; Console.SetCursorPosition(oldLeft, oldTop); return SelectedDate; } } 

You can use it like this:

  ConsoleDatePicker cdp = new ConsoleDatePicker(5, 5); cdp.Show(); DateTime date = cdp.GetDate(); Console.WriteLine("Вы выбрали {0:d}", date); 

Another option for use in the console GUI is simpler, less cumbersome, and most likely more convenient. Without the use of pseudographics, so it does not depend on the code page used (although in different cultures the representation of the date must be different dd.MM.yyyy / yyyy-MM-dd - if you wish, implement it yourself).

 class ConsoleDatePickerMini { public int Left { get; } public int Top { get; } public DateTime SelectedDate { get; private set; } public ConsoleDatePickerMini(int left, int top, DateTime date) { Left = left; Top = top; SelectedDate = date; } public ConsoleDatePickerMini(int left, int top) : this(left, top, DateTime.Today) { } public ConsoleDatePickerMini() : this(0, 0) { } public void Show() { int oldLeft = Console.CursorLeft, oldTop = Console.CursorTop; ShowDate(); Console.SetCursorPosition(oldLeft, oldTop); } public DateTime GetDate() { int oldLeft = Console.CursorLeft, oldTop = Console.CursorTop; bool cursorVisible = Console.CursorVisible; Console.CursorVisible = false; int f = 0; ConsoleKeyInfo key; do { ShowCursor(f); Console.SetCursorPosition(oldLeft, oldTop); key = Console.ReadKey(); if (key.Key == ConsoleKey.RightArrow) f = (f + 1) % 3; if (key.Key == ConsoleKey.LeftArrow) f = (f + 2) % 3; if (key.Key == ConsoleKey.UpArrow || key.Key == ConsoleKey.DownArrow) { int additive = key.Key == ConsoleKey.UpArrow ? 1 : -1; if (f == 0) SelectedDate = SelectedDate.AddDays(additive); else if (f == 1) SelectedDate = SelectedDate.AddMonths(additive); else if (f == 2) SelectedDate = SelectedDate.AddYears(additive); } ShowDate(); } while (key.Key != ConsoleKey.Enter); Console.CursorVisible = cursorVisible; Console.SetCursorPosition(oldLeft, oldTop); return SelectedDate; } void ShowDate() { Console.SetCursorPosition(Left, Top); Console.Write(" "); Console.SetCursorPosition(Left, Top + 1); Console.Write(SelectedDate.ToString("dd.MM.yyyy")); Console.SetCursorPosition(Left, Top + 2); Console.Write(" "); } void ShowCursor(int field) { int offset = new[] { 1, 4, 9 }[field]; // или по хакерски: int offset = (field + 1) * (field + 1); Console.SetCursorPosition(Left + offset, Top); Console.Write("+"); Console.SetCursorPosition(Left + offset, Top + 2); Console.Write("-"); } } 

Use similar to the previous one. Looks like that:

Try this:

 Console.WriteLine("Введите дату рождения в формате (DD.MM.YYYY): \n"); string input = Console.ReadLine(); string[] split = input.Split('.'); double day = Double.Parse(split[0]); double month = Double.Parse(split[1]); double year = Double.Parse(split[2]);