/// <summary>
/// Reads the next JSON token from the stream as a <see cref="Nullable{DateTime}"/>.
/// </summary>
/// <returns>A <see cref="String"/>. This method will return <c>null</c> at the end of an array.</returns>
public override DateTime?ReadAsDateTime()
{
DateTime?dateTime = _reader.ReadAsDateTime();
ValidateCurrentToken();
return(dateTime);
}