public static void getMetaData(string filePath, out string[] key, out string[] value)
{
var keyptr = IntPtr.Zero;
var valptr = IntPtr.Zero;
var metaCount = NativeClass.nativeGetMetaData(filePath, out keyptr, out valptr);
var keys = new IntPtr[metaCount];
var vals = new IntPtr[metaCount];
Marshal.Copy(keyptr, keys, 0, metaCount);
Marshal.Copy(valptr, vals, 0, metaCount);
var keyArray = new string[metaCount];
var valArray = new string[metaCount];
for (var i = 0; i < metaCount; i++)
{
keyArray[i] = Marshal.PtrToStringAnsi(keys[i]);
valArray[i] = Marshal.PtrToStringAnsi(vals[i]);
Marshal.FreeCoTaskMem(keys[i]);
Marshal.FreeCoTaskMem(vals[i]);
}
Marshal.FreeCoTaskMem(keyptr);
Marshal.FreeCoTaskMem(valptr);
key = keyArray;
value = valArray;
}
