[Help] How to calculate Standard Deviation of the data in Gridview C#

Question

I want to calculate the standard deviation value based on the data displayed in the Gridview. However I'm confused since the standard deviation function is not available in c#.
As seen in the picture below, if I press the "Process" button, it will display the standard deviation results of the data.

How do I write the code?

Thanks before.

Narayan · Answer

Try to use this function public double CalCulateStdDev(List lst) { if (lst == null || lst.Count == 0) throw new ArgumentException(Collection does not have anything to calculate); double d = 0; double average = lst.Average(); d = Math.Sqrt(lst.Select(a => Math.Pow(a - average 2)).Sum() / lst.Count); return d; }