>Out of interest, what "patterns from the .NET framework era" do you think don't work well in .Net core?

Overriding equals to do memberwise comparisons on POCOs

Any checking of types where pattern matching would be better

Old-style tuples without names (old style is tuple.Item1, tuple.Item2, etc.)

Checking of multiple tuple values at once without pattern matching

Any code that could be refactored with the new LINQ methods

Long ifs/switches that could be replaced by pattern matching

Concatenate a lot of strings (one per line) so there wasn't a ton of horizontal scroll, particularly for SQL in C# code

using statements still needing a level of nesting