无法从程序集“OpenTelemetry，版本=1.0.0.0，文化=中性”加载类型“System.ServiceProviderExtensions”

Question

封装参考

    <PackageReference Include="OpenTelemetry.Exporter.Jaeger" Version="1.4.0-beta.2" />
    <PackageReference Include="OpenTelemetry.Exporter.Prometheus" Version="1.2.0-rc5"/>
    <PackageReference Include="OpenTelemetry.Extensions.Hosting" Version="1.0.0-rc9.8" />
    <PackageReference Include="OpenTelemetry.Instrumentation.AspNetCore" Version="1.0.0-rc9.8" />
    <PackageReference Include="OpenTelemetry.Instrumentation.Http" Version="1.0.0-rc9.8" />

程序.cs

builder.Services.AddOpenTelemetryMetrics(b =>
{
    b.AddPrometheusExporter();
    b.AddMeter(TelemetryConstants.MyAppSource);
    b.SetResourceBuilder(resource);
    b.AddHttpClientInstrumentation();
    b.AddAspNetCoreInstrumentation();
});

当我运行该应用程序时，出现以下错误

System.TypeLoadException: 'Could not load type 'System.ServiceProviderExtensions' from assembly 'OpenTelemetry, Version=1.0.0.0, Culture=neutral, PublicKeyToken=7bd6737fe5b67e3c'.'

在app.UseOpenTelemetryPrometheusScrapingEndpoint();

Answer 1

添加包后错误消失opentelemetry.exporter.prometheus.aspnetcore。

Answer 2

OpenTelemetry.Exporter.Prometheus当我同时引用和包时，我看到了这个问题OpenTelemetry.Exporter.Prometheus.AspNetCore。删除OpenTelemetry.Exporter.Prometheus包引用解决了该问题。