There seems to be one case in which none of the above but the following helps. I'm developing a project for Windows Azure cloud platform and I have a web role. There is indeed a radio button Don't open page in Project -> {Project name} properties... as was pointed out by Pawel Krakowiak, but it has no effect in my case whatsoever. However, there is the main cloud project in solution explorer and there is the Roles folder under it. If I right click my web role in this folder and choose Properties, I get another set of settings and on the Configuration tab there is the Launch browser for flag, after unchecking it a new browser window is not opened on application start up.

There seems to be one case in which none of the above but the following helps. I'm developing a project for Windows Azure cloud platform and I have a web role. There is indeed a radio button Don't open page in Project -> {Project name} properties... as was pointed out by Pawel Krakowiak, but it has no effect in my case whatsoever. However, there is the main cloud project in solution explorer and there is the Roles folder under it. If I right click my web role in this folder and choose Properties, I get another set of settings and on the Configuration tab there is the Launch browser for flag, after unchecking it a new browser window is not opened on application start up.

在ASP中。Net 5项目现在可以为每个启动配置文件设置。

打开文件launchsettings。在Startup Project Properties文件夹下添加"launchBrowser": false到你正在配置的配置文件中，例如:

"profiles": {
    "IIS Express": {
      "commandName": "IISExpress",
      "launchBrowser": false,
      "environmentVariables": {
        "Hosting:Environment": "Development"
      }
    }
}

VS 15.7.1工具→选项→项目和解决方案→Web项目→取消勾选关闭浏览器窗口时停止调试器。

对于VS2022和ASP。NET核心:

另一个快捷方式是:单击右边绿色三角形按钮上的小下拉按钮，上面有项目名称，这通常会启动调试版本。然后是最后一个选项“{项目名}调试属性”，它直接启动专用的UI窗口。

从那里遵循@irf的建议:

“uncheck”选项不自动打开。

打开启动项目的属性(project→{ProjectName} properties…从主菜单或在“解决方案资源管理器”中右键单击项目并选择“属性”)，然后导航到“Web”选项卡，在“开始操作”下选择“不打开页面”。等待来自外部应用程序的请求。

您仍然可以使用任何浏览器(或Fiddler，无论什么)来访问正在运行的应用程序，但它不会自动打开浏览器窗口，它只是在后台启动并等待任何请求。