Excel一直拒绝该加载项，所以对我来说，解决方案是直接通过注册表进行.

Excel kept rejecting the Add-In, so the solution for me was doing it directly via the registry.

将以下文本另存为.reg文件，替换清单路径和FriendlyName以适合您的PROJECT，然后双击reg文件以将注册表项添加到注册表中.

Save the below text as a .reg file, replace the Manifest path and FriendlyName to suit your PROJECT and double click the reg file to add the key to the Registry.

Windows Registry Editor Version 5.00

[HKEY_CURRENT_USER\Software\Microsoft\Office\Excel\Addins\PROJECTExcelAddIn]
"Manifest"="file:///C:\\TFS\\Pg.PROJECT\\PROJECTExcelAddIn\\Src\\PROJECTExcelAddIn\\PROJECTExcelAddIn\\bin\\Debug\\PROJECTExcelAddIn.vsto"
"FriendlyName"="PROJECTExcelAddIn"
"LoadBehavior"=dword:00000003
"Description"="PROJECTExcelAddIn - Excel add-in for PROJECT."