C#.NET 编程开发技术、MSBUILD写法任务等...

C#.NET 编程开发技术

C#.NET网络通讯TCP、UDP、Socket

类库：
  SHA256等算法工具库 - https://github.com/ron4fun/SharpHash
    SharpHash.Base.HashFactory.Crypto.CreateSHA2_256().ComputeString(StrIn, new ASCIIEncoding()).GetBytes();

死记：
  C#实例对象不允许调用其静态方法。
  C#转换类型时，若有信息丢失则必须显式转换: int a=(int)0.1;

  out就地声明变量(还能将值类型变引用类型)：if (int.TryParse(input, out var result)) { WriteLine(result); }

单例：
  public sealed class Singleton
  {
    private static readonly Lazy lazy =
        new Lazy(() => new Singleton());

    public static Singleton Instance { get { return lazy.Value; } }

    private Singleton() { }
  }

流式响应下载：
  [HttpGet("products")]
  public async IAsyncEnumerable<Product> GetProductsAsync() {
    await foreach (var product in _context.Products.AsAsyncEnumerable()) { yield return product; }
  }

SDK:
  内建SDK  或自定义SDK(带版本号则从NuGet获取) 。

  私有包则应在项目目录或任意上级目录定义个 nuget.config ：
        <?xml version="1.0" encoding="utf-8"?>
        <configuration>
            <packageSources>
                <add key="github" value="https://nuget.pkg.github.com/iwangxiaodong/index.json" />
            </packageSources>
            <packageSourceCredentials>
                <github>
                    <add key="Username" value="iwangxiaodong" />
                    <add key="ClearTextPassword" value="apiKey" />
                </github>
            </packageSourceCredentials>
        </configuration>

MSBUILD各种构建任务(x.csproj)：
<Project Sdk="Microsoft.NET.Sdk">
  <PropertyGroup>
    <TargetFramework>net6.0</TargetFramework>
    <TargetFramework>同名则取后者</TargetFramework>
    <EnableDynamicLoading>true</EnableDynamicLoading>
  </PropertyGroup>
  
  <ItemGroup>
        <PackageReference Include="System.IdentityModel.Tokens.Jwt" Version="8.0.2" />
  </ItemGroup>

  <Target Name="PreBuild" BeforeTargets="PreBuildEvent" Condition=" '$(Configuration)' == 'ExportRelease' ">
    <Delete Files="$(IntermediateOutputPath)/$(AssemblyName).dll" />
  </Target>
  <Target Name="PostBuild" AfterTargets="PostBuildEvent" Condition=" '$(Configuration)' == 'ExportRelease' ">
    <!-- 构建时所在目录即项目源码根目录 -->
    <Message Text="Dir: $(MSBuildProjectDirectory)" />
    <Copy SourceFiles="$(TargetPath)" DestinationFiles=".\x.dll" SkipUnchangedFiles="true" />
    <Exec Command="tool.exe ./.config/x.xml" EnvironmentVariables="x=$(x);y=$(y)" />
    <Copy SourceFiles=".\x.dll" DestinationFiles="$(IntermediateOutputPath)/$(AssemblyName).dll" SkipUnchangedFiles="true" />
    <WriteLinesToFile File="./x.cfg" Overwrite="true" /><!-- 创建或清空文件 -->
    <Move SourceFiles="./x.cfg" DestinationFiles="./x.cfg-bak" /><!-- SourceFiles若不存在则报错！？ -->
  </Target>
</Project>