string.Format ignores NumberFormatInfo?

Question

I output data from a process to a csv. I store intermediate results in a data class, which also has methods to output the data to a string so it can be written to a file.

Answer 1

You have to use the N format specifier for Format to use the NumberFormatInfo. Try this

 return string.Format(nfi, "{0:N}\t{1:N}\t{2:N}",
            Value1,
            Value2,
            Value3,
        );