Support for Julian year

[ebfortin]

In Astronomy a year is exactly 365.25 days and is called a Julian year. It is used everywhere years are needed. I propose to add this to the Duration unit. Ref https://en.m.wikipedia.org/wiki/Julian_year_(astronomy)#:~:text=In%20astronomy%2C%20a%20Julian%20year,86400%20SI%20seconds%20each.

If agreed I'll add it to the code and create a PR.

EDIT: The 86400 seconds statement was not true.

[angularsen]

Sounds good to me 👍

[ebfortin]

I have a problem building UnitsNet. Apparently the .NET Framework Devpacks are not available anymore from MS. And I can't find it anywhere. However UnitsNet build for the .NET Framework 4.0 still. Any way to resolve that?

[angularsen]

You should find them here under .NET Framework:
https://dotnet.microsoft.com/download/visual-studio-sdks

If you need a workaround, you could temporarily edit all .csproj files:
<TargetFrameworks>netstandard2.0;net40;net47</TargetFrameworks> to <TargetFramework>netstandard2.0</TargetFramework> (note: singular name, not plural).

[ebfortin]

My problem is that from 4.5 downward only the runtime is available. Makes me wonder if it's not time to remove explicitly stating 4.0 in the project file.

[ebfortin]

Has been merged through PR #978