حفظ القيم في تطبيق .Net في مرحلة البناء

% mkdir Example && cd Example
% dotnet new console

using System;

namespace Example
{

[AttributeUsage(AttributeTargets.Assembly)] //     
public class ExampleAttribute : Attribute
{
    public string Value { get; set; }

    public ExampleAttribute(string value)
    {
        Value = value;
    }
}
 
}

<Project Sdk="Microsoft.NET.Sdk">

  <PropertyGroup>
    <OutputType>Exe</OutputType>
    <TargetFramework>netcoreapp3.1</TargetFramework>
    <RootNamespace>Example</RootNamespace>

    <ExampleValue>default</ExampleValue> <!--        -->
  </PropertyGroup>

  <!--          -->
  <ItemGroup>
    <AssemblyAttribute Include="Example.ExampleAttribute"> <!--    -->
      <_Parameter1>$(ExampleValue)</_Parameter1> <!--      -->
    </AssemblyAttribute>
  </ItemGroup>

</Project>

using System;
using System.Reflection;

namespace Example
{
    class Program
    {
        static void Main(string[] args)
        {
            var assembly = Assembly.GetExecutingAssembly();
            var attr = (ExampleAttribute) assembly.GetCustomAttribute(typeof(ExampleAttribute));
            Console.WriteLine($"Assembly attribute value = '{attr.Value}'");
        }
    }
}

% dotnet build .
% dotnet run --no-build .
Assembly attribute value = 'default'

% dotnet build . /p:ExampleValue="NOT DEFAULT"
% dotnet run --no-build .
Assembly attribute value = 'NOT DEFAULT'