添加项目文件。

test/Basic/Swagger/AddCartsByIdGetExternalDocs.cs

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+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")
+            };
+        }
+    }
+}

test/Basic/Swagger/AssignOperationVendorExtensions.cs

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+using Microsoft.OpenApi.Any;
+using Microsoft.OpenApi.Models;
+using Swashbuckle.AspNetCore.SwaggerGen;
+
+namespace Basic.Swagger
+{
+    public class AssignOperationVendorExtensions : IOperationFilter
+    {
+        public void Apply(OpenApiOperation operation, OperationFilterContext context)
+        {
+            operation.Extensions.Add("x-purpose", new OpenApiString("test"));
+        }
+    }
+}

test/Basic/Swagger/AssignRequestBodyVendorExtensions.cs

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+using Microsoft.OpenApi.Any;
+using Microsoft.OpenApi.Models;
+using Swashbuckle.AspNetCore.SwaggerGen;
+
+namespace Basic.Swagger
+{
+    public class AssignRequestBodyVendorExtensions : IRequestBodyFilter
+    {
+        public void Apply(OpenApiRequestBody requestBody, RequestBodyFilterContext context)
+        {
+            requestBody.Extensions.Add("x-purpose", new OpenApiString("test"));
+        }
+    }
+}

test/Basic/Swagger/ExamplesSchemaFilter.cs

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+using System;
+using Microsoft.OpenApi.Any;
+using Microsoft.OpenApi.Models;
+using Swashbuckle.AspNetCore.SwaggerGen;
+
+namespace Basic.Swagger
+{
+    public class ExamplesSchemaFilter : ISchemaFilter
+    {
+        public void Apply(OpenApiSchema schema, SchemaFilterContext context)
+        {
+            schema.Example = GetExampleOrNullFor(context.Type);
+        }
+
+        private IOpenApiAny GetExampleOrNullFor(Type type)
+        {
+            switch (type.Name)
+            {
+                case "Product":
+                    return new OpenApiObject
+                    {
+                        [ "id" ] = new OpenApiInteger(123),
+                        [ "description" ] = new OpenApiString("foobar"),
+                        [ "price" ] = new OpenApiDouble(14.37)
+                    };
+                default:
+                    return null;
+            }
+        }
+    }
+}