C# console app password entry logic. Not secured.

get_pw.cs

/*
 * Allow user to enter password
*/
Console.Write ("Please enter your password (12 - 256 chars)\nand press (Enter|Return): ");
bool entered = false;
ConsoleKeyInfo pwIn;
string pw;
StringBuilder sb = new StringBuilder ();
do {
	pwIn = Console.ReadKey ();

	if (pwIn.Key == ConsoleKey.Backspace) {
		if (sb.Length > 0) {
			sb.Remove (sb.Length - 1, 1);

		}
	} else if (pwIn.Key == ConsoleKey.Enter) {
		if (sb.Length < 12 || sb.Length > 256) {
			Console.Write ("\n");
			var color = Console.ForegroundColor;
			Console.ForegroundColor = ConsoleColor.Red;
			Console.WriteLine ("The password must be 12 - 256 characters");
			Console.ForegroundColor = color;

			sb.Clear();
			Console.Write ("Please enter your password: ");
		}
		else {
			entered = true;
		}
	} else {
		sb.Append (pwIn.KeyChar);
		Console.Write("\b*");
	}

} while (!entered);

pw = sb.ToString ();
sb = null;