Applying two filters to a .net DataFrame

Question

Is there a more convenient way to apply two filters to a DataFrame in .net than this method?

DataFrame origFrame = DataFrame.LoadCsv("sample.csv");
var filtered1 = origFrame.Filter(origFrame ["Column1"].ElementwiseGreaterThanOrEqual(1000));
var filtered2 = filtered1.Filter(filtered1["Column2"].ElementwiseIsNotNull());

I tried chaining filters but that fails because in the 2nd call of Filter I would need to have access to the result of the first call of Filter. Adding both conditons in one Filter also did not work out since I could not find any method to create a PrimitiveDataFrameColumn<bool> with two conditons.