As per this question - Azure functions v2 only supports .Net Core
We currently have Azure Functions v1 in production using .NET 4.6.1 which rely on 3rd party dlls which we do not have a .NET Core version yet. It could be 1-2 years before we get the 3rd party dlls to .NET Core, if ever. So some key questions I think everyone will want to know about upgrades are:
Q1 - Are there any plans to have Azure Functions v2 support the regular .NET Framework in the future to make upgrading our production system possible? If so are there any rough dates of when this might be available?
Q2 - If not then how long can we expect Microsoft to support Azure Functions v1? Is there an official mainstream & extended support schedule of dates like other Microsoft products announcing when you are going to turn off Azure Functions v1 ?
The killer issue here being if Microsoft turn off Azure Functions v1 without supporting .NET Framework on Azure Functions v2 this will cause significant problems for our production system in the future and we will need to stop migrating our code base to Azure Functions due to the lack of support.