>CopyToDataTable needs an IEnumberable of DataRows. We've discussed this before. See message #1573336. The code I gave you there is basically a simpler and less tested version of what was in the blog post.

I am going to implement it as shown here then

http://msdn.microsoft.com/en-us/library/bb669096.aspx

I copied the code into my project, but now I am getting a warning

Warning 1 Type library exporter warning processing Warning: Type library exporter encountered a generic type. Generic classes may not be exposed to COM.

Googling on this error suggests this workaround:

Make sure you have the ComVisible(false) attribute at the assembly
level (for example in AssemblyInfo.cs), and then explcitly mark the
types you want to export to COM with ComVisible(true).

I think I may need to consult with other developers in our company.