Rounding Large Dollar amounts

Question

I want to round a double value to the nearest $100,000 (i.e. $3,456,789 = $3.500,000)

However this needs to be done as a string because it is a label for an open source Chart drawing tool that takes a string to create the labels.

Any suggestions?

Vulpes · Answer

This code should do it: string s = $3456789; string t = s.Substring(1).Replace( ); double d = double.Parse(t); d = Math.Round(d/100000) * 100000; t = d.ToString(C0); // $3500000

Thomas · Answer

I didn't think of dividing and then multiplying... that is great. (and actually stripping out the commas isn't needed because it is originally a double but I was using the ToString(C) to display it as currency.) Thanks for the quick answer.