添加项目文件。

test/Basic/Swagger/AddCartsByIdGetExternalDocs.cs

@@ -0,0 +1,18 @@
+using System;
+using Microsoft.OpenApi.Models;
+using Swashbuckle.AspNetCore.SwaggerGen;
+
+namespace Basic.Swagger
+{
+    public class AddCartsByIdGetExternalDocs : IOperationFilter
+    {
+        public void Apply(OpenApiOperation operation, OperationFilterContext context)
+        {
+            operation.ExternalDocs = new OpenApiExternalDocs
+            {
+                Description = "External docs for CartsByIdGet",
+                Url = new Uri("https://tempuri.org/carts-by-id-get")
+            };
+        }
+    }
+}