public Task <object> GetInstanceAsync()
{
if (_class == null)
{
try
{
Dataset dataset = new Dataset();
IRasterLayer layer = (IRasterLayer)dataset.AddRasterFile(_filename);
if (layer != null && layer.Class is IRasterClass)
{
_class = layer.Class as IRasterClass;
if (_class is RasterClassV1)
{
if (!((RasterClassV1)_class).isValid)
{
_class = null;
}
}
}
}
catch { return(Task.FromResult <object>(_class)); }
}
return(Task.FromResult <object>(_class));
}
