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fern-support merged 1 commit into from
Jan 28, 2026
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Update changelogs from fern repo #3325

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17 changes: 17 additions & 0 deletions fern/products/sdks/overview/csharp/changelog/2026-01-28.mdx
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## 2.19.2
**`(fix):`** Fixes missing references to Core utilities in interface files for the Optional wrapper.


## 2.19.1
**`(fix):`** Fix nullable element types in collections to correctly preserve nullable markers.

Previously, nullable types nested inside collections would incorrectly strip the inner nullable marker:
- `nullable<list<nullable<string>>>` incorrectly generated `IEnumerable<string>?`
- `nullable<map<string, nullable<Address>>>` incorrectly generated `Dictionary<string, Address>?`

Now generates correctly:
- `nullable<list<nullable<string>>>` generates `IEnumerable<string?>?`
- `nullable<map<string, nullable<Address>>>` generates `Dictionary<string, Address?>?`
- `optional<map<string, nullable<string>>>` generates `Dictionary<string, string?>?`