C# - (int)Math.Round((double)(3514 + 3515)/2) =3514?

Question

Helo everyone.

int[] ai1=new int[2] { 3514,3515 };

    void average1()
    {
        List aveList = new List { ai1[0],ai1[1]};
        dou         


        

Answer 1

Math.Round is the culprit

int AverLI = (int)Math.Round((double)AveragLI);

Its what we call Banker's Rounding or even rounding.

Info on Math.Round says

The integer nearest a. If the fractional component of a is halfway between two integers, one of which is even and the other odd, then the even number is returned.

3514.5 is rounded to 3514 and 3515.5 will also be rounded to 3514.

Read this

To avoid do this

int AverLI = (int)Math.Ceiling((double)AveragLI);