Document AddIdentityCore as prerequisite for ConfigureApplicationCookie

[Copilot]

ConfigureApplicationCookie has an undocumented dependency on AddIdentityCore — it must be called after AddIdentityCore just as it must be after AddIdentity or AddDefaultIdentity. The docs only mentioned the latter two, leaving AddIdentityCore users without guidance.

Changes

• Cookie settings section (both >= aspnetcore-6.0 and < aspnetcore-6.0 monikers): Updated the prerequisite note to include AddIdentityCore:

  ConfigureApplicationCookie must be called after calling AddIdentityCore, AddIdentity, or AddDefaultIdentity.

Original prompt

---

This section details on the original issue you should resolve

<issue_title>ConfigureApplicationCookie after AddIdentityCore</issue_title>
<issue_description>In the section cookie-settings you say:
"must be called after calling AddIdentity or AddDefaultIdentity."
We found that there is also a dependency to AddIdentityCore that has to be called before ConfigureApplicationCookie
If this is correct this could be changed to "must be called after calling AddIdentityCore an before AddIdentity or AddDefaultIdentity."
We found no reference of AddIdentityCore in the docs of AddIdentity or AddDefaultIdentity. Maybe the dependency should be document there as well.

---

Document Details

⚠ Do not edit this section. It is required for docs.microsoft.com ➟ GitHub issue linking.

• ID: d3ac09f0-74ca-1a5d-4fec-695b84c1ac95
• Version Independent ID: cd2c1f5e-e4f0-d2c3-4737-8ff4f0c176c2
• Content: Configure ASP.NET Core Identity
• Content Source: aspnetcore/security/authentication/identity-configuration.md
• Product: aspnet-core
• Technology: aspnetcore-security
• GitHub Login: @AdrienTorris
• Microsoft Alias: riande</issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes ConfigureApplicationCookie after AddIdentityCore #22786

---

💬 We'd love your input! Share your thoughts on Copilot coding agent in our 2 minute survey.

---

Internal previews

📄 File	🔗 Preview link
aspnetcore/security/authentication/identity-configuration.md	Configure ASP.NET Core Identity

[wadepickett]

Approved. Looks great. one minor item, a missing metadata for ai-usage, see commit suggestion.