# \#core
**URL:** https://community.auth0.com/tag/core/216.md
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## [Hex Problems with asp.net core 2](https://community.auth0.com/t/hex-problems-with-asp-net-core-2/9388)
**Author:** [@alboy060694](https://community.auth0.com/u/alboy060694)\
**Replies:** 1\
**Last updated:** [December 17, 2018, 3:11pm UTC](https://community.auth0.com/t/hex-problems-with-asp-net-core-2/9388 "2018-12-17T15:11:44Z")
Hey guys, sry for my bad english. I have user the Quick setup options, i become alltime this error: An unhandled exception occurred while processing the request. XmlException: ‘.’, hexadecimal value 0x00, is an invali…
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## [Manual Register .NET CORE 2.0](https://community.auth0.com/t/manual-register-net-core-2-0/8391)
**Author:** [@harry](https://community.auth0.com/u/harry)\
**Replies:** 6\
**Last updated:** [October 18, 2017, 9:52pm UTC](https://community.auth0.com/t/manual-register-net-core-2-0/8391 "2017-10-18T21:52:48Z")
Migrated from 1.1 to 2.0, and I implemented a custom login instead of the lock originally provided. I have login’s working and signups from external providers working - but where’s the code for registering?
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## [Using WebAPP with WebAPI (CORE) doesn't seem to be possible?](https://community.auth0.com/t/using-webapp-with-webapi-core-doesnt-seem-to-be-possible/6270)
**Author:** [@harry](https://community.auth0.com/u/harry)\
**Replies:** 9\
**Last updated:** [April 28, 2017, 5:19am UTC](https://community.auth0.com/t/using-webapp-with-webapi-core-doesnt-seem-to-be-possible/6270 "2017-04-28T05:19:07Z")
I have both a C# WebAPI2 (using .NET CORE) working with an entirely separate project which is using WebAPP (.NET CORE). I can’t find an example of using Auth0 with this setup. I can’t get user claims in “helper classes”…