ConvertedString = System::Web::HttpUtility::HtmlEncode(SomeString);
	ConvertedString = System::Web::HttpUtility::UrlEncode(SomeString);

If its not available select project proiperties > Framework & References > add a reference to System.Web

HtmlEncode – HTML encoding makes sure that text is displayed correctly in the browser and not interpreted by the browser as HTML.

UrlEncode – Encodes a URL string. These method overloads can be used to encode the entire URL, including query-string values.

Making Strings Filename Safe

	for each (wchar_t c in IO::Path::GetInvalidFileNameChars())
		sTemp = sTemp->Replace(Convert::ToString(c), "");