using System;
using System.Collections.Generic;

public class Test
{
    public static void Main()
    {
        var tests = new List<double> { 131.505, 131.515, 131.525, 131.535, 131.545, 131.555, 131.565, 131.575, 131.585, 131.595 };
        foreach (double n in tests)
        {
            Console.WriteLine("{0} => {1}", n, Math.Round(n, 2, MidpointRounding.ToEven));
        }
    }
}