查询所有已注入的服务

```java
// Configure the HTTP request pipeline.
if (app.Environment.IsDevelopment())
{
    app.UseSwagger();
    app.UseSwaggerUI();

app.Map(pathMatch: "/allservices", b => b.Run(async context =>
    {
        context.Response.ContentType = "text/html; charset=utf-8";
        await context.Response.WriteAsync(@"<style>
                                                      table {
                                                        width: 100%;
                                                        border-collapse: collapse;
                                                        margin: 25px 0;
                                                        font-size: 0.9em;
                                                        min-width: 400px;
                                                        border-radius: 5px 5px 0 0;
                                                        overflow: hidden;
                                                        box-shadow: 0 0 20px rgba(0, 0, 0, 0.15);
                                                      }
                                                      th, td {
                                                        padding: 12px 15px;
                                                        text-align: left;
                                                        border-bottom: 1px solid #dddddd;
                                                      }
                                                      th {
                                                        background-color: #009879;
                                                        color: #ffffff;
                                                        text-align: center;
                                                      }
                                                      tr {
                                                        background-color: #f3f3f3;
                                                      }
                                                      tr:nth-of-type(even) {
                                                        background-color: #dddddd;
                                                      }
                                                    </style>");
        await context.Response.WriteAsync($"<h1>所有服务{builder.Services.Count}个</h1><table><thead><tr><th>类型</th><th>生命周期</th><th>Instance</th></tr></thead><tbody>");
        foreach (var svc in builder.Services)
        {
            await context.Response.WriteAsync("<tr>");
            await context.Response.WriteAsync($"<td>{svc.ServiceType.FullName}</td>");
            await context.Response.WriteAsync($"<td>{svc.Lifetime}</td>");
            await context.Response.WriteAsync($"<td>{svc.ImplementationType?.FullName}</td>");
            await context.Response.WriteAsync("</tr>");
        }
        await context.Response.WriteAsync("</tbody></table>");
    }));
}
```