# \#loginasync

**URL:** https://community.auth0.com/tag/loginasync/299.md

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## [Auth0 LoginAsync complains about newtonsoft .json dll version 10.0.0.0](https://community.auth0.com/t/auth0-loginasync-complains-about-newtonsoft-json-dll-version-10-0-0-0/13457)

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**Author:** [@mohd.parwezakhtar](https://community.auth0.com/u/mohd.parwezakhtar)\
**Replies:** 1\
**Last updated:** [September 6, 2018, 9:28pm UTC](https://community.auth0.com/t/auth0-loginasync-complains-about-newtonsoft-json-dll-version-10-0-0-0/13457 "2018-09-06T21:28:39Z")

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I am facing a weird kind of situation while trying acheiving LoginAsync using Auth0.OidcclientWpf SDK. I am using below code: private async void PerformAuthenticationAsync() { Auth0Client auth0Client = new Auth0Clie…

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## [Auth0Client.LoginAsync() v4.x doesn't return refresh token in a C# WPF app](https://community.auth0.com/t/auth0client-loginasync-v4-x-doesnt-return-refresh-token-in-a-c-wpf-app/6248)

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**Author:** [@craig\_beebe](https://community.auth0.com/u/craig_beebe)\
**Replies:** 0\
**Last updated:** [April 18, 2017, 7:20am UTC](https://community.auth0.com/t/auth0client-loginasync-v4-x-doesnt-return-refresh-token-in-a-c-wpf-app/6248 "2017-04-18T07:20:46Z")

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Here’s my code: var auth0 = new Auth0Client( Properties.Settings.Default.auth0Domain, Properties.Settings.Default.auth0ClientID); var handle = new WindowInteropHelper(this).Handle; var windowWrapper = new Window…