友好异常处理

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### Furion 版本号

2.12.9

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### Web 项目类型

- [x] WebApi
- [ ] Mvc
- [ ] Razor Pages
- [ ] Blazor Server
- [ ] MinApp

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### 描述你的问题

采用自定义IUnifyResultProvider方式捕捉异常，Startup类Configure方法中设置返回 200 状态码列表时，如果设置null，接口会返回200，但同时会抛出异常，（MiniProfiler不会记录起来）。

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### 异常堆栈信息

[2021-07-12 13:57:45.013 ERR] An unhandled exception has occurred while executing the request.
{"EventId":{"Id":1,"Name":"UnhandledException"},"SourceContext":"Microsoft.AspNetCore.Diagnostics.DeveloperExceptionPageMiddleware","RequestId":"80000052-0000-fd00-b63f-84710c7967bb","RequestPath":"/api/dev"}
System.InvalidOperationException: StatusCode cannot be set because the response has already started.
   at Microsoft.AspNetCore.Server.IIS.Core.IISHttpContext.ThrowResponseAlreadyStartedException(String name)
   at Microsoft.AspNetCore.Server.IIS.Core.IISHttpContext.set_StatusCode(Int32 value)
   at Microsoft.AspNetCore.Server.IIS.Core.IISHttpContext.Microsoft.AspNetCore.Http.Features.IHttpResponseFeature.set_StatusCode(Int32 value)
   at Microsoft.AspNetCore.Http.DefaultHttpResponse.set_StatusCode(Int32 value)
   at Furion.UnifyResult.UnifyContext.SetResponseStatusCodes(HttpContext context, Int32 statusCode, UnifyResultStatusCodesOptions options)
   at IMyBest.Lottery.Core.Extensions.MyUnifyResultProvider.OnResponseStatusCodes(HttpContext context, Int32 statusCode, UnifyResultStatusCodesOptions options) in D:\xxx\Extensions\MyUnifyResultProvider.cs:line 91
   at Furion.UnifyResult.UnifyResultStatusCodesMiddleware.InvokeAsync(HttpContext context)
   at Microsoft.AspNetCore.Diagnostics.DeveloperExceptionPageMiddleware.Invoke(HttpContext context)

[2021-07-12 13:57:47.339 ERR] Connection ID "18230571293206380625", Request ID "80000052-0000-fd00-b63f-84710c7967bb": An unhandled exception was thrown by the application.
{"EventId":{"Id":2,"Name":"ApplicationError"},"SourceContext":"Microsoft.AspNetCore.Server.IIS.Core.IISHttpServer","RequestId":"80000052-0000-fd00-b63f-84710c7967bb","RequestPath":"/api/dev"}
System.InvalidOperationException: StatusCode cannot be set because the response has already started.
   at Microsoft.AspNetCore.Server.IIS.Core.IISHttpContext.ThrowResponseAlreadyStartedException(String name)
   at Microsoft.AspNetCore.Server.IIS.Core.IISHttpContext.set_StatusCode(Int32 value)
   at Microsoft.AspNetCore.Server.IIS.Core.IISHttpContext.Microsoft.AspNetCore.Http.Features.IHttpResponseFeature.set_StatusCode(Int32 value)
   at Microsoft.AspNetCore.Http.DefaultHttpResponse.set_StatusCode(Int32 value)
   at Furion.UnifyResult.UnifyContext.SetResponseStatusCodes(HttpContext context, Int32 statusCode, UnifyResultStatusCodesOptions options)
   at IMyBest.Lottery.Core.Extensions.MyUnifyResultProvider.OnResponseStatusCodes(HttpContext context, Int32 statusCode, UnifyResultStatusCodesOptions options) in D:\xxx\Extensions\MyUnifyResultProvider.cs:line 91
   at Furion.UnifyResult.UnifyResultStatusCodesMiddleware.InvokeAsync(HttpContext context)
   at Microsoft.AspNetCore.Diagnostics.DeveloperExceptionPageMiddleware.Invoke(HttpContext context)
   at Microsoft.AspNetCore.Diagnostics.DeveloperExceptionPageMiddleware.Invoke(HttpContext context)
   at StackExchange.Profiling.MiniProfilerMiddleware.Invoke(HttpContext context) in C:\projects\dotnet\src\MiniProfiler.AspNetCore\MiniProfilerMiddleware.cs:line 103
   at Furion.StartupFilter.<>c__DisplayClass0_1.<<Configure>b__1>d.MoveNext()
--- End of stack trace from previous location ---
   at Microsoft.AspNetCore.Server.IIS.Core.IISHttpContextOfT`1.ProcessRequestAsync()

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### 代码或代码仓库

```
// 添加规范化结果状态码，需要在这里注册
app.UseUnifyResultStatusCodes(options =>
{
    options.Return200StatusCodes = null; // 设置null会报错：StatusCode cannot be set because the response has already started.
    //options.Return200StatusCodes = new[] { 401, 403 }; // 配置返回 200 的状态码
});

```

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### 数据库信息

- [ ] Sqlite
- [ ] SqlServer
- [x] Mysql
- [ ] Oracle
- [ ] PGSql
- [ ] Firebird
- [ ] Cosmos

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### 期待结果

默认：401，403，如果设置为 null，则标识所有状态码都返回 200，不抛出异常。

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GVP dotNET China/Furion

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GVPdotNET China/Furion

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