Issues

• Multiple levels of inheritance not supported

  RicoSuter/NSwag#5409 · Filter by author Peter-Svahn opened on Oct 5, 2026

• JsonInheritanceConverter fails to serialize base class instances

  RicoSuter/NSwag#5408 · Filter by author Peter-Svahn opened on Oct 4, 2026
  1

• TypeScript client: format: date query and path parameters are serialised with toISOString() instead of a date-only string

  RicoSuter/NSwag#5405 · Filter by author salahBouragba opened on Sep 18, 2026
  1

• Property of type double is parsed to decimal

  RicoSuter/NSwag#5399 · Filter by author rwb196884 opened on Aug 20, 2026
  1

• A custom string format silently degrades to string with no way to map it

  RicoSuter/NSwag#5394 · Filter by author F2X opened on Jul 29, 2026
  1

• Update Angular template to support httpResources rather than httpClient

  RicoSuter/NSwag#5390 · Filter by author sdedieu opened on Jun 19, 2026
  2

• IFormFile not generating FileParameter when using .NET 10 OpenAPI 3.1 output (format:binary not recognized)

  RicoSuter/NSwag#5387 · Filter by author omerkocadere opened on Jun 14, 2026
  2

• Specifying ResponseHeadersRead vs ResponseContent read in SendAsync

  RicoSuter/NSwag#5385 · Filter by author mattrandle opened on Jun 8, 2026
  2

• UseRequiredKeyword fails to generate default values for non-nullable, non-required properties when RespectNullable is true, resulting in generated code that will not compile in projects that use #nullable enable

  RicoSuter/NSwag#5384 · Filter by author KirkMunroSagent opened on May 31, 2026

• net_http_synchronous_reads_not_supported in Blazor wasm (net10)

  RicoSuter/NSwag#5382 · Filter by author rwb196884 opened on May 29, 2026
  2

• NoContent 204 should throw a new exception derived from ApiException

  RicoSuter/NSwag#5380 · Filter by author DJDoena opened on May 18, 2026

• SwaggerUi EnableTryItOut = false doesnt't work anymore

  RicoSuter/NSwag#5379 · Filter by author dp-sgr opened on May 12, 2026

• Serialization when preserving references is incorrect.

  RicoSuter/NSwag#5378 · Filter by author vvdb-architecture opened on May 12, 2026

• I made #5283 PR which skips JSON.Prase() completely if framework is axios.

  RicoSuter/NSwag#5376 · Filter by author pgadmin7 opened on May 7, 2026
  1

• Nullable required DateOnly generates a not nullable DateTime property

  RicoSuter/NSwag#5375 · Filter by author killergege opened on May 4, 2026

• Issue adding per-request header for C# client

  RicoSuter/NSwag#5372 · Filter by author bme-cgm opened on Apr 27, 2026

• Create typescript definitions from csproj fail

  RicoSuter/NSwag#5371 · Filter by author bad5074 opened on Apr 23, 2026

• [Axios] [Blob] Vue Typescript compiler show errors relevant to TS(2322) "Type AxiosHeaderValue | undefined is not assignable to type string | undefined"

  RicoSuter/NSwag#5368 · Filter by author sangnt-developer opened on Apr 21, 2026
  9

• Unrecognised arguments are present: [Used arguments (2) != Provided arguments (1) -> Check []]

  RicoSuter/NSwag#5366 · Filter by author MoeHamdanCA opened on Apr 17, 2026

• required nullable value types are generated as non-nullable

  RicoSuter/NSwag#5364 · Filter by author vvdb-architecture opened on Apr 15, 2026
  1

• OpenApi -> CSharp generated contract has string defaults for integer property - uncompilable

  RicoSuter/NSwag#5362 · Filter by author david-c14 opened on Apr 13, 2026
  2

• Allow for specifying custom base class for generated C# client exceptions

  RicoSuter/NSwag#5356 · Filter by author goldsam opened on Apr 7, 2026

• C# client generator for multipart/form-data with multiple file parameters looses the first file parameter

  RicoSuter/NSwag#5354 · Filter by author paulomorgado opened on Mar 18, 2026
  3

• Base class with only JsonExtendDataAttribute property should not be Dictioanry

  RicoSuter/NSwag#5353 · Filter by author John0King opened on Mar 16, 2026

• Support Generate Model for both S.T.J and Newtonsoft.Json

  RicoSuter/NSwag#5351 · Filter by author John0King opened on Mar 12, 2026