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Visual Studio: Edit and Continue issues

Huge thanks to Steve French for this one

Like him, I'd been having issues with "Edit and Continue" not working for ages.  I tried everything and none of the usual advice helped at all.  Finally I came across Steve's post here, and as he suggests, uninstalling Stackify Prefix immediately fixed the problem. Turns out everything was fine to start with, it was just Prefix that was getting in the way (probably due to the way it injects itself into the runtime / server / etc).

For reference other settings I tried included:
Tools -> Options -> Debugging -> Enable Edit and Continue
Project Properties -> Web -> Enable Edit and Continue

It kind of sucks because I really liked Prefix, but it's only useful in specific situations, whereas Edit and Continue is much more useful. I guess I'll have to find another profiler...
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Installing SQL Server Express to set up an Azure database locally

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Salesforce admin gotchas

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After installing the Application Insights nuget package to an Umbraco solution, you'll get this error:

A section using 'configSource' may contain no other attributes or elements

<ExamineLuceneIndexSets configSource="config\ExamineIndex.config" />
     <log4net configSource="config\log4net.config">
             <level value="ALL" />
             <appender-ref ref="aiAppender" />
Source File: \project\web.config

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IIS HTTP Error 500.19, Error Code 0x8007000d

I probably come across this error at least once per year. Ran into it again today when setting up a website to host locally in IIS, on a computer I don't use much.

HTTP Error 500.19 - Internal Server Error
The requested page cannot be accessed because the related configuration data for the page is invalid.

Detailed Error Information:
Module   IIS Web Core
Notification   Unknown
Handler   Not yet determined
Error Code   0x8007000d

Config Source:

Microsoft's documentation for that error code helpfully points out:

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Well that clears it up. Just remove the malformed XML element on line 0...

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