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.

.NET核心Web Api项目的更新答案…

右键单击项目，选择“属性”，转到“调试”，取消“启动浏览器”复选框(默认启用)。

Joao Costa的答案同样适用于。net core 2项目。

launchsettings。json——> "launchBrowser": false

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

I looked over the answers and didn't see the solution I found mentioned. If it was, my apologies. In my case, currently using Visual Studio 2015. In the solution explorer, right click on the Project file and click properties. Go to the Debug tab and this should have info for how you're launching "IIS Express or Web(DNX)" for the first two drop downs, and then there should be a checkmark box for "Launch URL:". Uncheck this option and your browser won't be automatically launched everytime you go to debug your application. Hope this helps someone out.

看起来2022年的维密秀已经改变了，

现在它有一个专门的用户界面，

右键单击项目(在解决方案资源管理器中)>选择属性，然后遵循:-

“uncheck”选项不自动打开。

或者您可以单击菜单栏，调试>属性

你可以直接从那里到达第二步“启动配置文件”

或者一个捷径:

选择项目(在解决方案资源管理器中)并按Alt + Enter，然后从那里开始。

虽然有几个很好的答案，从通常的怀疑到更新的解决方案，但我想再提供一个解决方案，以解决当您在多个项目中处理一个解决方案时应该做的事情。

在得到这个解决方案之前，我一直在应用程序主机中查看bindingInformation。配置解决方案，不知疲倦地寻找为什么事情不工作的任何线索。

事实证明，我忽略了一个简单的事情，那就是不同的项目也有各自的设置。 因此，除了Project > {Project- name}属性…> Web >开始行动在我的后端项目，我还必须去网站>开始选项…开始行动在我的Frontend项目。在那里，我选择了不要打开页面。等待来自外部应用程序的请求，从那时起就一直很快乐!