.NET Core 3.1 apps with the .NET 5 Hosting Bundle are supported to work?

Tomonori Taniguchi 16 Reputation points
2020-11-26T01:54:26.47+00:00

Hi.

When I installed the Hosting Bundle for .NET 5, the Hosting Bundle for .NET Core 3.1 disappeared.

I checked this folder.
C:\Program Files\IIS\Asp.Net Core Module\V2

.NET Core 3.1 apps with the .NET 5 Hosting Bundle are supported to work?
In addition, I would like to know if there is any mention of this in the official documentation.

  • Background
    I have multiple .NET Core 3.1 apps running on a single windows server.
    I have converted one of them to .NET 5 and would like to continue running .NET Core 3.1 apps on the same server.

Thanks,

.NET Runtime
.NET Runtime
.NET: Microsoft Technologies based on the .NET software framework.Runtime: An environment required to run apps that aren't compiled to machine language.
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  1. Xantari 11 Reputation points
    2021-03-11T14:54:56.247+00:00

    Yeah there really should be explicit documentation on this. I've been wondering the same thing. (If installed the .NET 5 hosting bundle is going to cause problems for all of our applications still on .NET Core 3.1)

    2 people found this answer helpful.
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  2. Kevork Keheian 1 Reputation point
    2020-11-27T05:51:06.667+00:00

    Installing .net5 does not override previous installation. .net core 3.1 was not supposed to disappear.
    You ca check by typing dotnet --list or dotnet --info.

    You can install multiple hosting bundles of dotnet at the same time and you can host multiple version of .net apps on the same server

  3. Jerry Cai-MSFT 986 Reputation points
    2020-12-03T07:33:35.45+00:00

    Hi,chiguniiita

    Have you tried copy and paste the old version after 5.0 installed, or install 3.1 bundle again?

    And .net 3.1 can work with .net 5.0, you can check side-by-side-executionand multiple-versions-of-net-on-the-same-server

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  4. Lex Li (Microsoft) 4,662 Reputation points Microsoft Employee
    2020-12-04T01:16:58.793+00:00

    ASP.NET Core module used to be backward compatible. For example, release 13.0 supports both ASP.NET Core 3.0 and 2.2, https://github.com/dotnet/AspNetCore/issues/15243

    So you probably can assume the same applies to .NET 5 and .NET Core 3.1, though this is no explicit documentation on that.

  5. Rafik Samman 7 Reputation points
    2021-10-29T20:29:41.35+00:00

    It doesn't seem like .net core 3.1 and .net 5.0 are side by side anymore.
    I've had this issue multiple times now.
    I'm using .net 5.0.11 and .net core 3.1.20 was installed via windows update and it broke my compiling and publishing of my angular 11 .net core 5.0 app.

    Thanks,
    Rafik Samman