Update sharepoint 2010 workflow tasks with current logged in user name

Problem:

By nature, SP workflows runs with 'System Account' and all workflow related tasks have been created & modified by system account. What if, task should be created/modified with current login user who initiated workflow? There is no answer and I searched in a google and no luck.. finally i tried my self with the help of old MSDN article and found a solution.

Solution:

How to capture current login name of the user and assign into workflow propertis?

Here is the code snippet

string username = string.Empty;
private void onTaskChanged1_Invoked(object sender, ExternalDataEventArgs e)
{
username = e.Identity;
SPUser user = workflowProperties.Web.SiteUsers[username].ID;
 workflowProperties.Item["Checked by"] = user.Name;
 workflowProperties.Item.Update();
}

That's it...

Happy programming......