private IEnumerable <string> Validate()
{
if (!OriginalPassword.IsValidString())
{
yield return("Please enter your original password");
}
if (!NewPassword.IsValidString())
{
yield return("Please enter your new password");
}
if (NewPassword?.Length < 3)
{
yield return("New password must be made up of at least 3 letters");
}
if (NewPassword != ConfirmPassword)
{
yield return("Passwords do not match!");
}
}