I am using RDCOM as a data-transfer between R and C#.net. I got a question on datasets with missing data. For instance, if list = c(1,2,3,NA,5), in R, typeof(list) is integer but, in C#, I did not see a suitable data type for (1,2,3,NA,5). Of course, one can use is.na to transfer (1,2,3,NA,5) into string[] in C#. So, how to handle NA in this case? Please help. Thank,
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