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fern-support merged 1 commit into from
May 1, 2026
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Update changelogs from fern repo #5305

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18 changes: 18 additions & 0 deletions fern/products/sdks/generators/csharp/changelog/2026-05-01.mdx
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## 2.64.2
**`(fix):`** Dedup auth-derived headers in the generated client constructor when
multiple auth schemes resolve to the same HTTP header name (for
example, an oauth2 bearer scheme plus an apiKey-in-header scheme
both named `Authorization`). Previously the constructor's
`Dictionary<string, string>` collection initializer added the same
key twice and threw `System.ArgumentException: An item with the
same key has already been added` at runtime. Earlier auth schemes
win, preserving the ordering established by the IR.


**`(fix):`** Fix literal boolean auth-header values being emitted as `"True"` regardless
of the configured value. The generated client constructor's auth-header
dictionary tested the truthiness of the `Literal` discriminated-union
object instead of reading its `boolean` field, so a literal `false` header
incorrectly produced `"True"`.


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