咨询：能否将.NET 4.5应用部署至App Engine及平台支持情况

Hey there, let's tackle your two questions together since they're essentially the same—yes, you can deploy a .NET 4.5 application to Google App Engine, but it depends entirely on which environment you choose to use. Here's the breakdown:

App Engine Standard Environment #

This environment has strict, pre-configured runtime constraints. As of now, the natively supported .NET runtimes start at .NET Core 3.1 and newer (including .NET 5, 6, 7, and 8). The legacy .NET Framework 4.5 (a Windows-only runtime) isn't supported here out of the box. So if you're targeting the standard environment, you can't deploy an unmodified .NET 4.5 app directly.

App Engine Flexible Environment #

This is where you get more control. The flexible environment allows custom Docker containers, which means you can package your .NET 4.5 app into a Windows-based Docker image (since .NET Framework requires Windows) and deploy that. Here's a quick example of a Dockerfile you might use:

# Use a Windows Server base image with .NET Framework 4.5 pre-installed
FROM mcr.microsoft.com/dotnet/framework/runtime:4.5-windowsservercore-ltsc2019

# Copy your application files into the container
COPY ./path-to-your-app/ /app/

# Set the working directory to your app folder
WORKDIR /app

# Define the entry point for your application (adjust this to match your app's executable or IIS setup)
ENTRYPOINT ["YourApplication.exe"]

A Few Important Notes #

• Windows containers on App Engine Flexible have higher resource costs compared to Linux containers, so keep that in mind for your budget.
• If long-term maintenance is a concern, consider migrating your .NET 4.5 app to .NET Core or a newer .NET version. This will let you use the standard environment, get better performance, and reduce costs.

内容的提问来源于stack exchange，提问作者Developer