We've just moved our .net 4.6.1 MVC/WebApi application from IISExpress to IIS and are now getting the following exception when trying to debug the application from Visual Studio 2015:
Unable to start debugging on the web server. The underlying connection was closed: An unexpected error occurred on a receive
Any help appreciated.
Found the answer:
We had url rewriting in place that was preventing VisualStudio from accessing /debugattach.aspx.
Excluding debugattach.aspx from the rule allows visual studio to access the resource and solves the issue. So the rule ended up looking like this:
<rule name="subpath-kill" stopProcessing="true">
<match url="^(cacherefresh|debugattach.aspx)$" negate="true" />
<action type="AbortRequest" />
</rule>
