com api - getuserlist() KeyNamedPair

the specific error - 

Unable to cast COM object of type 'System.__ComObject' to interface type 'MFilesAPI.IKeyNamePairs'. This operation failed because the QueryInterface call on the COM component for the interface with IID '{9F896259-C49C-4104-8F05-42EA32872BEE}' failed due to the following error: No such interface supported (Exception from HRESULT: 0x80004002 (E_NOINTERFACE)).

the code - 

IKeyNamePairs item = vault.UserOperations.GetUserList();

Console.WriteLine("Number of accounts in " + item.Count);
//Console.WriteLine(item.Cast<string>());

var list = new List<string>();

foreach (IKeyNamePairs pair in item)
{

list.Add(pair.ToString());

}

Our collections are a little awkward.  The method returns an instance of IKeyNamePairs, but each item within it will be an IKeyNamePair.  Note the single/plural difference.  Something like this should work:

var list = new List<string>();
{
    IKeyNamePairs item = vault.UserOperations.GetUserList();
    
    Console.WriteLine("Number of accounts in " + item.Count);
    
    foreach (var pair in item.Cast<IKeyNamePair>())
    {
        list.Add(pair.Name);
    }
}

That said, I don't know whether I've used this API method and so I don't know exactly what it'll return.  Might I suggest instead GetUserAccounts?  The reason I suggest that is that you get much more data back (the entire UserAccount data).

That worked, thank you for that. I'll take a look at GetUserAccounts

That worked, thank you for that. I'll take a look at GetUserAccounts