using DevExpress.ExpressApp.WebApi.Services;
using Microsoft.OpenApi.Models;
using Microsoft.AspNetCore.OData;
// ...
public void ConfigureServices(IServiceCollection services) {
// ...     
    services.AddXafWebApi(Configuration, options => { 
        // To make a Business Object available via Web API and
        // to generate GET, POST, PUT, and DELETE HTTP methods for it,
        // uncomment the following line.
        // !!!
        // options.BusinessObject<YourBusinessObject>();
        // !!!
    })
    // In EF Core applications, do nothing. 
    // In XPO applications, uncomment the following line.
    // !!!
    // .AddXpoServices()
    // !!!
    ;
    services.AddControllers().AddOData((options, serviceProvider) => {
        options
            .AddRouteComponents("api/odata", new EdmModelBuilder(serviceProvider).GetEdmModel())
            .EnableQueryFeatures(100);
    });
    services.AddSwaggerGen(c => {
        c.EnableAnnotations();
        c.SwaggerDoc("v1", new OpenApiInfo {
            Title = "MySolution API",
            Version = "v1",
            Description = @"Use AddXafWebApi(Configuration, options) in the MySolution.Blazor.Server\Startup.cs file to make Business Objects available in the Web API."
        });
    });
}

public void Configure(IApplicationBuilder app, IWebHostEnvironment env) {
    if(env.IsDevelopment()) {
        // ...
        app.UseSwagger();
        app.UseSwaggerUI(c => {
            c.SwaggerEndpoint("/swagger/v1/swagger.json", "MySolution WebApi v1");
        });
    }
    // ...
}