GetFolderItems

// Create the folder filter to specify the scope of your search
// Here, we are limiting the item search to the inbox
// You can also limit by owner, date, status and position
DocuSignWeb.FolderFilter filter = new DocuSignWeb.FolderFilter();
filter.AccountId = _accountId;
filter.FolderTypeInfo = new DocuSignWeb.FolderTypeInfo();
filter.FolderTypeInfo.FolderType = DocuSignWeb.FolderType.Inbox;
// Now, call the method with the filter we created
DocuSignWeb.FolderResults results = _apiClient.GetFolderItems(filter);
// If there are results, print out the details
if (results.ResultSetSize > 0)
{
    // Loop through and print out some information about the results
    Console.WriteLine("Envelopes in the inbox are:");
    foreach (DocuSignWeb.FolderItem item in results.FolderItems)    {
        Console.WriteLine("\tEnvelope {0} has status of: {1}",
        item.EnvelopeId, item.Status);
    }
}