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Parsing a DateTime from String in Metro app RRS feed

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    I am trying to use System::DateTime::Parse, but it it not working.  Here is my wrapper class:

    #pragma once

#using <mscorlib.dll>

class ISODateParser
{
public:
	static Windows::Globalization::Calendar^ ParseISODate(Platform::String^ ISODate)
	{
		Windows::Foundation::DateTime dateTimeRepresentation;
		dateTimeRepresentation.UniversalTime = System::DateTime::Parse(ISODate).ToUniversalTime().ToBinary();

		Windows::Globalization::Calendar^ retVal = ref new Windows::Globalization::Calendar();
		retVal->FromDateTime(dateTimeRepresentation);
		return retVal;
	}
};

    System::DateTime::Parse will not compile, and it gives me the error:

    error C2683: 'dynamic_cast' : 'System::Object' is not a polymorphic type

    What is the correct way to use this method?  I have tried using System::DateTime::ParseExact and System::Convert::ToDateTime as well.

    Can these .NET methods be used in a Windows Metro App?  I do not see any method to get a Windows::Foundation::DateTime or Windows::Globalization::Calendar from a String representation.  I suppose I may just have to write my own parser implementation.

    Sunday, April 1, 2012 5:17 PM

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