ADSdotNET: A DLL for Using Alternate Data Streams from .NET Languages

// ADSdotNET.h

#pragma once

using namespace System;

namespace AdsDotNet 
{
	public ref class AdsHandler
	{
	private:
		//members:
		String ^filename;
		ref class AdsStore
		{
		private:
			System::Collections::Generic::Dictionary<String^, IntPtr> ^name_handle_dict;
			System::Collections::Generic::Dictionary<String^, System::IO::FileStream ^> ^name_filestream_dict;

		public:
			AdsStore()
			{
				name_handle_dict = gcnew System::Collections::Generic::Dictionary<String^, IntPtr>();
				name_filestream_dict = gcnew System::Collections::Generic::Dictionary<String^, System::IO::FileStream ^>();
			}

			void Add(String ^name, IntPtr handle, System::IO::FileStream ^filestream)
			{
				name_handle_dict->Add(name, handle);
				name_filestream_dict->Add(name, filestream);
			}

			void Remove(String ^name)
			{
				name_handle_dict->Remove(name);
				name_filestream_dict->Remove(name);
			}

			IntPtr GetHandle(String ^name)
			{
				return name_handle_dict[name];
			}

			System::IO::FileStream ^GetFilestream(String ^name)
			{
				return name_filestream_dict[name];
			}

			bool IsAdsInStore(String ^name)
			{
				return name_handle_dict->ContainsKey(name);
			}
		};

		AdsStore ^ads_store;

		// private methods:
		wchar_t *ConvertManagedStringToCharPointer(String ^managed_string);
		System::IO::FileStream ^CreateAdsFileStream(HANDLE file_handle);
		DWORD CloseFileHandle(HANDLE file_handle);
		void ThrowAppropriateCreateFileException(DWORD errorcode);

	public:
		//ctor:
		AdsHandler(String ^filename);

		// public methods:
		void AddAds(String ^adsname);
		void DeleteAds(String ^adsname);
		bool AdsExists(String ^adsname);
		void CloseAds(String ^adsname);
		bool IsAdsOpen(String ^adsname);
		System::Collections::Generic::List<System::String^> ^GetAdsList();
		System::IO::FileStream ^OpenAds(String ^adsname);
		System::IO::FileStream ^OpenAds(String ^adsname, bool readonly);
		System::String ^GetCompleteFilename(String ^adsname);
	};

}