How do I determine if the executing assembly is a web app or winform/console?

I would like to write a helper function which build the exception message to write to a log.
The code look like:

if(IsWebApp)
{

      use HttpContext to get the Request Path and RawUrl
}
else
{
      //else it a winform/console
      Use Assembly to get executing path.

}

Answers:

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Method 1

Use the HttpRuntime class:

if (!String.IsNullOrEmpty(HttpRuntime.AppDomainAppVirtualPath))
    //ASP.Net
else 
    //Non-ASP.Net

Method 2

Just check for some object that only exists in a web application, like HttpRuntime.AppVirtualPath that SLaks suggested.

If it’s a web application, you would still want to check if HttpContext.Current is null. If the exception occurs in code that is not run beacuse of a request, it doesn’t have any context. The Session_OnEnd event for example runs when a server session is removed, so it doesn’t have the context.

Method 3

You can check to see if HttpContext.Current != null.

Method 4

How about

If (Not System.Web.HttpContext.Current Is Nothing) Then

End If

or

if(System.Web.HttpContext.Current != null){

}

Method 5

I use the DomainManager type of Current AppDomain. MSDN documentation of AppDomainManager

public static class AspContext
{
    public static bool IsAspNet()
    {
        var appDomainManager = AppDomain.CurrentDomain.DomainManager;
        return appDomainManager != null && appDomainManager.GetType().Name.Contains("AspNetAppDomainManager");
    }
}

You can also check this other answer on SO

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