System.Net.CFString.AsString C# (CSharp) Method

		public static string AsString (IntPtr handle)
		{
			if (handle == IntPtr.Zero)
				return null;
			
			int len = CFStringGetLength (handle);
			
			if (len == 0)
				return string.Empty;
			
			IntPtr chars = CFStringGetCharactersPtr (handle);
			IntPtr buffer = IntPtr.Zero;
			
			if (chars == IntPtr.Zero) {
				CFRange range = new CFRange (0, len);
				buffer = Marshal.AllocHGlobal (len * 2);
				CFStringGetCharacters (handle, range, buffer);
				chars = buffer;
			}

			string str;

			unsafe {
				str = new string ((char *) chars, 0, len);
			}
			
			if (buffer != IntPtr.Zero)
				Marshal.FreeHGlobal (buffer);

			return str;
		}