.NET Core doesn’t know about Windows 1252, how to fix?

To do this, you need to register the CodePagesEncodingProvider instance from the System.Text.Encoding.CodePages package.

To do that, install the System.Text.Encoding.CodePages package:

dotnet add package System.Text.Encoding.CodePages

Then (after implicitly or explicitly running dotnet restore) you can call:

Encoding.RegisterProvider(CodePagesEncodingProvider.Instance);
var enc1252 = Encoding.GetEncoding(1252);

Alternatively, if you only need that one code page, you can get it directly, without registration:

var enc1252 = CodePagesEncodingProvider.Instance.GetEncoding(1252);