gistfile1.cs

public static MapReduceResult MapReduce(MongoCollection collection, IMongoQuery query, IMongoMapReduceOptions options, string name)
{
    string map = GetMap(name);
    string reduce = GetReduce(name);
    string finalise = GetFinalise(name);

    if (finalise != null)
    {
        MapReduceOptionsBuilder o = options as MapReduceOptionsBuilder;
        o.SetFinalize(finalise);                
    }
        
    
    if (query != null)
        return collection.MapReduce(query, map, reduce, options);
    else
        return collection.MapReduce(map, reduce, options);
}