'Could not load type 'System.Environment' from assembly 'System.Runtime, Version=4.2.2.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a'

We are updating from .NET 3.1 to .NET 6. After deploying the Azure Function App, the "Runtime version" displays, "Error", and the below message is on the overview page.

Could not load type 'System.Environment' from assembly 'System.Runtime, Version=4.2.2.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a'.

c++sharp.netazureazure-functions


Solution 1:[1]

The solution is to update the function app to version 4.

Updating the following project values to:

<TargetFramework>net6.0</TargetFramework>
<AzureFunctionsVersion>v4</AzureFunctionsVersion>

and

Using this command: az functionapp config appsettings set --settings FUNCTIONS_EXTENSION_VERSION=~4 -n <APP_NAME> -g <RESOURCE_GROUP_NAME>

source: https://docs.microsoft.com/en-us/azure/azure-functions/functions-versions?tabs=in-process%2Cv4&pivots=programming-language-csharp#migrating-from-3x-to-4x

Sources

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Source: Stack Overflow

Solution Source
Solution 1 chmoder

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