C# Math.Round

Question

var d = 0.0004998;//I Wont see 0,001
var d1 = 0.0005998;;//I Wont see 0,001
var d2 = 0.0004598;;//I Wont see 0,001
var d3 = 0.0004498;;//I Wont see 0,001 !!!!!!!
var d4 = 0.0004698;;//I Wont see 0,001
var D = new Double[] { d, d1, d2, d3, d4 };
foreach (var item in D) { Console.WriteLine(Math.Round(item,3,MidpointRounding.AwayFromZero)); }
Console.ReadLine();

Answer 1

I would expect d, d2, d3, and d4 to round to 0. When running your code I see d1 round to 0.001

AwayFromZero means Round to nearest mode: when a number is halfway between two others, it is rounded toward the nearest number that is away from zero.

https://learn.microsoft.com/en-us/dotnet/api/system.midpointrounding?view=net-5.0

Answer 2

Although the documentation provided by vb2ae says that this enum is applicable to .Net Core and .Net Framework, it is not exactly the same in different environments.

In .Net Framework, it has only two fields; in .Net Core, it has four.

MidpointRounding Enum

MidpointRounding Enum

If you want each value to be 0.001, you can set its value to ToPositiveInfinity in .Net Core.

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