P/Invoke and wrapper method for RoParseTypeName

gistfile1.cs

static string[] ParseTypeName(string typename)
{
    UInt32 partsCount;
    IntPtr[] typeNameParts = null;

    try
    {
        var hr = RoParseTypeName(typename, out partsCount, out typeNameParts);

        var parts = partsCount == 0 ? new string[0] : typeNameParts.Select(p => WindowsRuntimeMarshal.PtrToStringHString(p)).ToArray();

        return parts;
    }
    finally
    {
        if (typeNameParts != null)
        {
            foreach (var part in typeNameParts) { WindowsRuntimeMarshal.FreeHString(part); }
        }
    }
            
}

[DllImport("WinTypes.dll")]
static extern UInt32 RoParseTypeName(
    [MarshalAs(UnmanagedType.HString)] string typename,
    out UInt32 partsCount,
    [MarshalAs(UnmanagedType.LPArray, SizeParamIndex=1)] out IntPtr[] typeNameParts);