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CSV doesn't round-trip string `null` value.
Repro:
- Write a data set with
Variable<string>
that containsnull
element to a.csv
file - Read the
.csv
file.
Observed: the element is string.Empty
.
Expected: the element is null
.
See also Empty_AddVariable_string
test in SDSLiteTests/GenericFileTests.cs
.