I'm not familiar with dropnet, but looking at the source code, it appears you should be able to do this by using the GetMetaData()
method off of your _client
object. This method returns a MetaData
object.
Example:
//gets contents at requested path
var metaData = _client.GetMetaData("/Public/DropboxManagement/Logs");
//without knowing how this API works, Path may be a full path and therefore need to check for "/Public/DropboxManagement/Logs" + folder
if (metaData.Contents.Any(c => c.Is_Dir && c.Path == folder)
{
//folder exists
}