Moderne licensed

Use Frozen collections instead of Immutable

Recipe IDOpenRewrite.Recipes.CSharp.Migration.Dotnet.Net9.UseFrozenCollectionsArtifactOpenRewrite.Recipes.CSharp.Migration.Dotnet

Replace ToImmutableDictionary() with ToFrozenDictionary() and ToImmutableHashSet() with ToFrozenSet(). Frozen collections (.NET 8+) provide better read performance for collections populated once and read many times.

Single recipemodernizationcsharpdotnetProprietary

Usage

This recipe has no required configuration options. You’ll need the Moderne CLI configured before running the command below.

mod run . --recipe OpenRewrite.Recipes.CSharp.Migration.Dotnet.Net9.UseFrozenCollections

If the recipe isn’t available locally, install it with:

mod config recipes nuget install OpenRewrite.Recipes.CSharp.Migration.Dotnet