NetLah.Abstractions 0.1.0

NetLah.Abstractions - .NET Library

NetLah.Abstractions is a library which contains a set of reusable classes for storage and retrieve .NET assembly build date time at runtime. These libray classes are ApplicationInfo, AssemblyInfo, AssemblyBuildDateAttribute.

Nuget package

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Getting started

This solution come from the idea of Gérald Barré on Meziantou's blog Getting the date of build of a .NET assembly at runtime

1. Add the attribute declaration in the .csproj

<ItemGroup>
  <AssemblyAttribute Include="NetLah.Runtime.AssemblyBuildDateAttribute">
    <_Parameter1>$([System.DateTime]::UtcNow.ToString("yyyy-MM-ddTHH:mm:ss"))</_Parameter1>
  </AssemblyAttribute>
</ItemGroup>

2. Retrieve build datetime of assemly

var asm = new AssemblyInfo(typeof(AssemblyInfo).Assembly);
Console.WriteLine($"AssemblyTitle:{asm.Title}");
Console.WriteLine($"Version:{asm.InformationalVersion} BuildTime:{asm.BuildTimestampLocal}; Framework:{asm.FrameworkName}");

The output:

AssemblyTitle:NetLah.Abstractions
Version:0.0.0-alpha.0.1 BuildTime:2021-05-09T12:26:28+08:00; Framework:.NETStandard,Version=v2.1

3. Or Retrieve build datetime of entry assemly

var appInfo = ApplicationInfo.Initialize(null);
Console.WriteLine($"AppTitle:{appInfo.Title}");
Console.WriteLine($"Version:{appInfo.InformationalVersion} BuildTime:{appInfo.BuildTimestampLocal};Framework:{appInfo.FrameworkName}");

Output:

AppTitle:SampleApp
Version:0.0.0-alpha.0.1 BuildTime:2021-05-09T12:26:56+08:00; Framework:.NETCoreApp,Version=v5.0

4. Use Directory.Build.props to declare build date attribute to all projects inside the solution

<Project>

  <PropertyGroup>
   ...
  </PropertyGroup>

  <ItemGroup>
    <AssemblyAttribute Include="NetLah.Runtime.AssemblyBuildDateAttribute">
      <_Parameter1>$([System.DateTime]::UtcNow.ToString("yyyy-MM-ddTHH:mm:ss"))</_Parameter1>
    </AssemblyAttribute>
  </ItemGroup>

</Project>