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When I try to run WCF debug mode in Visual studio 2017, I get the following errors in events viewer :

The Module DLL 'C:\Program Files (x86)\IIS Express\Asp.Net Core Module\V2\aspnetcorev2.dll' could not be loaded due to a configuration problem. The current configuration only supports loading images built for a x86 processor architecture. The data field contains the error number. To learn more about this issue, including how to troubleshooting this kind of processor architecture mismatch error, see http://go.microsoft.com/fwlink/?LinkId=29349.

And by that I couldn't launch my service.

Simply Ged
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Phạm Thế Hùng
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  • Doesn't seems to be WCF problem but issue asp.net core v2. Some corrupted file is stopping IIS Express to open. Try reinstalling asp.net core v2. – Pranav Singh Feb 11 '19 at 04:31
  • Did you find your answer? – mahlatse Feb 11 '19 at 10:08
  • I had tried reinstalling asp.net core v2, but it's still not worth :((. Thanks – Phạm Thế Hùng Feb 12 '19 at 05:21
  • If you are not using .net core , you could try to remove reference to .net core.[https://stackoverflow.com/questions/40161982/aspnetcore-dll-failed-to-load](https://stackoverflow.com/questions/40161982/aspnetcore-dll-failed-to-load),please don't forget to backup the applicationhost.config – Ackelry Xu Feb 12 '19 at 06:31

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Thank for all of your suggestion. I had done to resolve this by add comment 2 line of the file ".vs\config\applicationhost.config"

<!--  <add name="AspNetCoreModule" image="%IIS_BIN%\aspnetcore.dll" />
            <add name="AspNetCoreModuleV2" image="%IIS_BIN%\Asp.Net Core Module\V2\aspnetcorev2.dll" /> -->
Phạm Thế Hùng
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