/// <summary>
/// This method accepts a character input and validates if it is a letter.
/// </summary>
/// <param name="descriptionString">Description String for display</param>
/// <returns>character Input</returns>
private static char GetCharacterInput(string descriptionString)
{
var character = UserInputGathering.GetCharacterInput(descriptionString);
if (!UserInputValidation.IsValidLetter(character))
{
throw new InvalidOperationException(" ");
}
return(character);
}