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">
    <Name>HelloWorld</Name>
    <FullClassName>HelloWorld.HelloWorld</FullClassName>
    <Text>HelloWorld</Text>
    <Description>Show Hello World.</Description>
    <VisibilityMode>AlwaysVisible</VisibilityMode>
    <Assembly>C:\Samples\HelloWorld\HelloWorld\bin\Debug\HelloWorld.dll</Assembly>
    <AddInId>239BD853-36E4-461f-9171-C5ACEDA4E723</AddInId>
    <VendorId>ADSK</VendorId>
    <VendorDescription>Autodesk, Inc, www.autodesk.com</VendorDescription>
  </AddIn>
</RevitAddIns>

Note: The FullClassName includes the Root namespace found on the Application tab of the properties for the project.

Save the file as HelloWorld.addin and put it in the following location:
- C:\ProgramData\Autodesk\Revit\Addins\2017\

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