public virtual void InputPersonInformation()
{
Console.Write("Name: ");
Name = StringInput.InputStringWithLettersOnly("Name: ");
Console.Write("Surname: ");
Surname = StringInput.InputStringWithLettersOnly("Surname: ");
Console.Write("Age: ");
Age = NumbersInput.Integer("Age");
Console.Write("Gender: ");
Gender = StringInput.InputGender();
}