windows server 2016  IIS  webapi   404 error

• In IIS select your website and double-click Handler Mappings  （处理程序映射）
• Find ExtensionlessUrlHandler-ISAPI-4.0_32bit and double-click
• In the dialog that appears, click Request Restrictions
• On the Verbs tab add the missing HTTP verbs separated by commas (in my case it was PUTand DELETE
• Click Ok where required and answer Yes in the Edit Script Map dialog that pops up.
• Repeat for ExtensionlessUrlHandler-ISAPI-4.0_64bit

webapi put 404