quantlib SWIG C# MonotonicLogCubicNaturalSpline

[Moon Yan]

Hi,
I am new to the SWIG thing. Basicly, I want to build a yield term structure through bootstrapping using MonotonicLogCubicNaturalSpline, however, I can't figure out how to using MonotonicLogCubicNaturalSpline in QuantLib SWIG c#, or other interpolation scheme in bootstrapping for that matter. How should the QlArray be built?  Thanks for any advise.