Microsoft.Azure.Devices.Client incorrectly determines .NET Standard support

[terrajobst]

This issue was reported by a customer.

1. Use .NET 5 preview.
2. Install Microsoft.Azure.Devices.Client

Expectation

Stuff works.

Actuality

The customer gets an exception:

Unhandled exception. System.NotSupportedException: Specified method is not supported.
   at Microsoft.Azure.Devices.Client.Common.ReadOnlyMergeDictionary`2.System.Collections.Generic.ICollection<System.Collections.Generic.KeyValuePair>.get_Count()

It seems the root cause is a fragile check in the MSBuild targets:

  <PropertyGroup>
    <SupportsNetStandard20AndAbove Condition="'$(TargetFramework)' == 'netstandard2.1' Or '$(TargetFramework)' == 'netstandard2.0' Or '$(TargetFramework)' == 'net472'">true</SupportsNetStandard20AndAbove>
  </PropertyGroup>

What are you trying to achieve by this method?

[azabbasi]

We are working on the fix. Will update the issue once the fix is released with a new version.

[abhipsaMisra]

Duplicate of #1562

[az-iot-builder-01]

@terrajobst, @azabbasi, @abhipsaMisra, thank you for your contribution to our open-sourced project! Please help us improve by filling out this 2-minute customer satisfaction survey

[azabbasi]

Fix has been checked in. We will update the issue when a release is published.

[terrajobst]

@azabbasi

Fix has been checked in. We will update the issue when a release is published.

Thanks for reopening this to keep me posted. I have posed a question here: #1562 (comment)

[azabbasi]

@terrajobst Azure IoT SDK team has released a new version of the SDK that include fixes for this issue.
2020-10-8

Please confirm and we will close the Issue afterwards.

[abhipsaMisra]

Closing this since this has now been released.