Appcenter: Failing to build Xamarin forms app using C#9

Created on 11 Feb 2021  路  5Comments  路  Source: microsoft/appcenter

When building Xamarin forms app which consumes c#9 AppCenter fails build with this error

CSC : error CS1617: Invalid option '9.0' for /langversion. Use '/langversion:?' to list supported values.

But I can successful build locally on my PC or macOS

build feature request reviewed-DRI
Source
picture Alex-Dobrynin
👍7

Most helpful comment

Bump? How is it possible that Microsoft's own tools don't support their own language? Setting project version to latestmajor fails to compile on AppCenter with C# 9 features.

picture ianthetechie on 22 May 2021
👍2

All 5 comments

C# 9 was released in November, it's now 5 months later and this is still not supported?

varyamereon picture varyamereon on 4 Apr 2021
😕2

It looks like #86

Alexbits picture Alexbits on 5 Apr 2021

Bump? How is it possible that Microsoft's own tools don't support their own language? Setting project version to latestmajor fails to compile on AppCenter with C# 9 features.

ianthetechie picture ianthetechie on 22 May 2021
👍2

Any update? I still have the same issue.

NaveedAhmadHematmal picture NaveedAhmadHematmal on 29 Jun 2021

I had to switch to Azure DevOps builds because of this issue.

Alexbits picture Alexbits on 29 Jun 2021
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