API Versioning in .Net Core.

What is API versioning

• API versioning helps you to manage and maintain different versions of endpoints.
• It allows the developer to add new functionality instead of changing the existing ones as some clients rely on an older version

Common ways to implement API versioning

• URL versioning: https://localhost:7091/api/v1/weatherForecast
• Header versioning: https://localhost:7091/api/weatherForecast -H 'X-Api-Version: 1'
• Query parameter versioning: https://localhost:7091/api/weatherForecast?api-version=1

Implement URL versioning

• Create Project with .NetCore web api template

• Install Nuget packages
  Asp.Versioning.Mvc : Required for MVC controller end Point and
  Asp.Versioning.Mvc.ApiExplorer: Required for ASP.NET Core API Versioning.

• Use AddApiVersioning to provide options for API versioning ApiVersioningOptions.

Added the definition of each line in the comment (refer to the above snapshot).

• At the controller level specify the supported API version.

• Postman Result

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