Install-Package Swashbuckle.AspNetCore //控制台
Microsoft.Extensions.PlatformAbstractions //包管理，用来获取xml根目录

 public void ConfigureServices(IServiceCollection services)
        {
            services.AddMvc().SetCompatibilityVersion(CompatibilityVersion.Version_2_1);
            services.AddSwaggerGen(c =>
            {
                //var basePath = Path.GetDirectoryName(typeof(Program).Assembly.Location);//获取应用程序所在目录（绝对，不受工作目录影响，建议采用此方法获取路径）
                //var xmlPath = Path.Combine(basePath, "swaggerApi.xml");
                //c.IncludeXmlComments(xmlPath);
                c.SwaggerDoc("v1", new Info
                {

                    Version = "v1",
                    Title = "测试接口",
                    Description = "一个测试接口",
                    TermsOfService = "None",
                    Contact = new Contact
                    {
                        Name = "Shayne Boyer",
                        Email = string.Empty,
                        Url = "https://twitter.com/spboyer"
                    },
                    License = new License
                    {
                        Name = "Use under LICX",
                        Url = "https://example.com/license"
                    }
                });
            });
            services.ConfigureSwaggerGen(c =>
            {
                c.IncludeXmlComments(GetXmlSwaggerCommentsFilePath());
            });
        }

        private string GetXmlSwaggerCommentsFilePath()
        {
            var app = PlatformServices.Default.Application;
            return Path.Combine(app.ApplicationBasePath, Path.ChangeExtension(app.ApplicationName, "xml"));
        }

 <PropertyGroup>
    <GenerateDocumentationFile>true</GenerateDocumentationFile>
    <NoWarn>$(NoWarn);1591</NoWarn>
  </PropertyGroup>

  <PropertyGroup>
    <DocumentationFile>bin\$(Configuration)\$(TargetFramework)\$(AssemblyName).xml</DocumentationFile>
    <NoWarn>1701;1702;1591;</NoWarn>
  </PropertyGroup>