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Migration Guide 12.0 to 12.1

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Jimmy Bogard edited this page Jul 7, 2023 · 1 revision

With 12.1, AddMediatR no longer scans for any implementations of:

  • Behaviors
  • Stream behaviors
  • Pre-processors
  • Post-processors

You will need to explicitly register these with methods:

  • Behaviors
    • AddBehavior
    • AddOpenBehavior
  • Stream behaviors
    • AddStreamBehavior
    • AddOpenStreamBehavior
  • Pre processors
    • AddRequestPreProcessor
    • AddOpenRequestPreProcessor
  • Post processors
    • AddRequestPostProcessor
    • AddOpenRequestPostProcessor

Since you couldn't change the order of these with the scanning approach, AddMediatR now registers with ServiceCollection in the exact order added to each list of registrations.

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