35 lines
1.5 KiB
Markdown
35 lines
1.5 KiB
Markdown
## Calling CreateDefaultAuthorizationContext with a null argument has changed
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### Scope
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Minor
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### Version Introduced
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4.6
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### Source Analyzer Status
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Available
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### Change Description
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The implementation of the <xref:System.IdentityModel.Policy.AuthorizationContext?displayProperty=name>
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returned by a call to the
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<xref:System.IdentityModel.Policy.AuthorizationContext.CreateDefaultAuthorizationContext(System.Collections.Generic.IList{System.IdentityModel.Policy.IAuthorizationPolicy})?displayProperty=name>
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with a null authorizationPolicies argument has changed its implementation in the
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.NET Framework 4.6.
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- [x] Quirked
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- [ ] Build-time break
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### Recommended Action
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In rare cases, WCF apps that use custom authentication may see behavioral differences. In such cases, the previous behavior can be restored in either of two ways:
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1. Recompile your app to target an earlier version of the .NET Framework than 4.6. For IIS-hosted services, use the <httpRuntime targetFramework="x.x" /> element to target an earlier version of the .NET Framework.
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2. Add the following line to the `<appSettings>` section of your app.config file: `<add key="appContext.SetSwitch:Switch.System.IdentityModel.EnableCachedEmptyDefaultAuthorizationContext" value="true" />`
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### Affected APIs
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* `M:System.IdentityModel.Policy.AuthorizationContext.CreateDefaultAuthorizationContext(System.Collections.Generic.IList{System.IdentityModel.Policy.IAuthorizationPolicy})`
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### Category
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Windows Communication Foundation (WCF)
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<!-- breaking change id: 138 -->
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