void DisposeRadApi()
{
if (_api == null)
return;
_api.TagFound -= Api_TagFound;
_api.NoTagFound -= Api_NoTagFound;
try
{
_api.Dispose();
}
catch { Debug.WriteLine("Error at _api.Dispose()"); }
_api = null;
}
void CreateRadApi()
{
if (_api != null)
DisposeRadApi();
_api = new RadApi(_writeKey);
_api.TagFound += Api_TagFound;
_api.NoTagFound += Api_NoTagFound;
}