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How to map custom routes for Umbraco api controllers | codeshare.co.uk .NET Web Developer Blog by Paul Seal
If Attribute Routing is enabled and a named route is used the backoffice breaks · Issue #4620 · umbraco/Umbraco-CMS · GitHub
v8: Custom MVC route breaks PluginController routing in the backoffice · Issue #6103 · umbraco/Umbraco-CMS · GitHub
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V8 enabling WebApi attribute routing breaks PostSave endpoint · Issue #4464 · umbraco/Umbraco-CMS · GitHub
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