[FEATURE REQUEST]: Request for support of reducebykey on dataframes

I am planning to avail .net for spark in my product and ran the program of word count. I wanted to use reducebyKey to avoid shuffling across all partitions. But did not find reduceByKey on dataframe.cs.

May be i am new to this .net connector with spark but is this feasible to avail it in dot net. Or do we already have an similar alternative already existing for .Net with spark.