Field grouping in SolrNet?

I am trying to make a query in solr.net that generates a solr query with a filter query with more than one term in it e.g.: fq=Size:(4 large)

However, when I pass ?f_Size=(4 large) in the query string to the SolrNet sample app (found here: http://code.google.com/p/solrnet/downloads/list), no results are found.

Looking at the logs开发者_开发问答, I can see that the filter query generated is fq=Size:"\(4+large\)" so it makes sense that no results are found.

Is there a way in SolrNet to generate a filter query with more than one term?

Where the filter queries are built, try replacing Query.Field(...).Is(...) with Query.Simple(...) (you have to build the query yourself). See the wiki for reference.