Startup.cs

// Código resumido para ocupar menos espacio

namespace WebApiSwaggerVersion
{
    public class Startup
    {
        public void ConfigureServices(IServiceCollection services)
        {
        
            services.AddSwaggerGen(config =>
            {
                var titleBase = "Movies API";
                var description = "This is a Web API for Movies operations";
                var TermsOfService = new Uri("https://udemy.com/user/felipegaviln/");
                var License = new OpenApiLicense()
                {
                    Name = "MIT"
                };
                var Contact = new OpenApiContact()
                {
                    Name = "Felipe Gavilán",
                    Email = "[email protected]",
                    Url = new Uri("https://gavilan.blog/")
                };

                config.SwaggerDoc("v1", new OpenApiInfo
                {
                    Version = "v1",
                    Title = titleBase + " v1",
                    Description = description,
                    TermsOfService = TermsOfService,
                    License = License,
                    Contact = Contact
                });

                config.SwaggerDoc("v2", new OpenApiInfo
                {
                    Version = "v2",
                    Title = titleBase + " v2",
                    Description = description,
                    TermsOfService = TermsOfService,
                    License = License,
                    Contact = Contact
                });
            });
        }

        public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
        {
            if (env.IsDevelopment())
            {
                app.UseDeveloperExceptionPage();
            }

            app.UseSwagger();

            app.UseSwaggerUI(config =>
            {
                config.SwaggerEndpoint("/swagger/v1/swagger.json", "MoviesAPI v1");
                config.SwaggerEndpoint("/swagger/v2/swagger.json", "MoviesAPI v2");
            });
        }
    }
}