Issues

• Support by-ref parameters

  nsubstitute/NSubstitute#992 · Filter by author zvirja opened on Aug 10, 2026

• Add a way to compare collections (enumerables, sets...) by their content

  nsubstitute/NSubstitute#964 · Filter by author fterrani opened on May 17, 2026

• NSubstitute 7.0.0 roadmap proposal

  nsubstitute/NSubstitute#953 · Filter by author Romfos opened on Mar 15, 2026

• Remove/Clear CustomHandlers just like ClearSubstitute()

  nsubstitute/NSubstitute#947 · Filter by author PawelKaminski-Rel opened on Feb 26, 2026

• Use of DidNotReceiveWithAnyArgs with overloaded methods

  feature-request
  nsubstitute/NSubstitute#945 · Filter by author CharliePoole opened on Feb 18, 2026
  2

• Method for including pragmas in generated docs

  documentation
  nsubstitute/NSubstitute#943 · Filter by author dtchepak opened on Feb 8, 2026

• optional "Strict mode" support

  nsubstitute/NSubstitute#923 · Filter by author CzBuCHi opened on Nov 5, 2025
  3

• Let Arg.Is provide richer assertion information when checking received calls

  nsubstitute/NSubstitute#906 · Filter by author tomsoliver-cloudbeds opened on Sep 18, 2025
  2

• Building main with Castle.Core 5.2.1 gives build errors (Possible null reference) & has an issue with default interface implementations

  nsubstitute/NSubstitute#871 · Filter by author 304NotModified opened on Mar 9, 2025
  6

• AmbiguousArgumentsException exception thrown if struct type in matcher has ctor with this call

  nsubstitute/NSubstitute#865 · Filter by author Tornhoof opened on Feb 19, 2025
  2

• Proposal: Call-time argument matching for verifying mutable objects in ordered calls

  feature-request
  nsubstitute/NSubstitute#861 · Filter by author loop8ack opened on Jan 28, 2025
  1

• Intercept any call to a generic method when using Arg.AnyType as a generic argument

  feature-request
  nsubstitute/NSubstitute#854 · Filter by author JMolenkamp opened on Dec 13, 2024

• IEnumerable<T> Argument Matchers behave incorrectly when T is an enum and the argument is a casted array

  bug
  nsubstitute/NSubstitute#847 · Filter by author uflowie opened on Nov 29, 2024

• Support call forwarding to a provided instance for types it implements that are also included in substitute being created.

  nsubstitute/NSubstitute#841 · Filter by author rbeurskens opened on Nov 5, 2024

• Received.InOrder does not verify property getters

  documentation
  nsubstitute/NSubstitute#839 · Filter by author RobSwDev opened on Nov 4, 2024
  1

• [DOC] Add NSubstituteDefaultFactory config steps to documentation

  documentation
  nsubstitute/NSubstitute#837 · Filter by author dtchepak opened on Oct 26, 2024

• Allow callbacks (Do/Does) before Returns

  feature-request
  nsubstitute/NSubstitute#833 · Filter by author Jason31569 opened on Oct 4, 2024
  3

• How to tell if a method/property has been substituted/configured?

  nsubstitute/NSubstitute#827 · Filter by author Metritutus opened on Aug 30, 2024

• Clear configured call

  feature-request
  nsubstitute/NSubstitute#821 · Filter by author velvolue opened on Jun 21, 2024
  3

• Provide a way to pass null for custom event args so that Raise.EventWith can be used to raise events for custom event args without a default constructor

  feature-request
  nsubstitute/NSubstitute#788 · Filter by author zhitchcock77 opened on Mar 27, 2024

• Unable to match arguments whose type is generic, when their concrete type is not known

  question
  nsubstitute/NSubstitute#786 · Filter by author gianvitodifilippo opened on Mar 13, 2024
  1

• NSubstitute.Exceptions.SubstituteInternalException

  bug
  nsubstitute/NSubstitute#784 · Filter by author Allann opened on Mar 7, 2024
  2

• Provide more intuitive methods

  nsubstitute/NSubstitute#782 · Filter by author BenjaminAbt opened on Feb 27, 2024
  3

• Add ability to capture and verify on an argument at the same time

  feature-request
  nsubstitute/NSubstitute#781 · Filter by author asos-AdamCox opened on Feb 16, 2024
  1

  

• How to argument match the generic parameter of a Func<T> with generic constraints?

  question
  nsubstitute/NSubstitute#767 · Filter by author cado1982 opened on Jan 12, 2024