public void ImportFromFileToTaskManager(string fileName, TaskManager taskManager)
{
if (String.IsNullOrEmpty(fileName))
{
throw new ArgumentException("fileName can't be null or empty", "fileName");
}
if (taskManager == null)
{
throw new ArgumentNullException("taskManager");
}
var oldTasks = TaskStore.LoadFromFile <List <T> >(fileName);
if (oldTasks == null)
{
string message = String.Format("Can't load old tasks from '{0}'", fileName);
throw new InvalidOperationException(message);
}
ConvertTasks(oldTasks, taskManager);
}
