Create a .addin manifest file

The HelloWorld.dll file appears in the project output directory. If you want to invoke the application in Revit, create a manifest file to register it into Revit.

To create a manifest file, create a new text file in Notepad.

Add the following text:

Code Region 30-10: Creating a .addin manifest file for an external command

<?xml version="1.0" encoding="utf-8" standalone="no"?>
<RevitAddIns>
        <AddIn Type="Command">
        <Assembly>D:\Sample\HelloWorld\bin\Debug\HelloWorld.dll</Assembly>
        <AddInId>239BD853-36E4-461f-9171-C5ACEDA4E721</AddInId>
        <FullClassName>Class1</FullClassName>
        <Text>HelloWorld</Text>  
        <VendorId>ADSK</VendorId>
        <VendorDescription>Autodesk, www.autodesk.com</VendorDescription>
        </AddIn>
</RevitAddIns>

Save the file as HelloWorld.addin and put it in the following location:
- For Windows XP - C:\Documents and Settings\All Users\Application Data\Autodesk\Revit\Addins\2016\
- For Vista/Windows 7/Windows 8 - C:\ProgramData\Autodesk\Revit\Addins\2016\

Refer to Add-in Integration for more details using manifest files.