1. OnInit (Init)  -- Inializes all Child controls on the Page

2. LoadControlState  -- Loads the Control State 

3. LoadViewState -- Loads the View State

4. LoadPostData -- Control properties are set according to the received form data

5. Load -- Actions can be performed on the controls as all the pre-activities are complete by this time

6. RaisePostDataChangedEvent -- This event is raised if data has been changed in previous and Current Postbacks.

7. RaisePostBackEvent -- This event handles the user action that caused the Postback.

8. PreRender (OnPreRender) -- This event takes place between postback and saving viewstate. Till this stage changes will be saved to the control.

9. SaveControlState -- Self Explanatory

10. SaveViewState -- Self Explanatory

11. Render -- Generates artifacts at Client side (HTML,DHTML,Scripts) to properly display controls

12. Dispose -- Releases unmanaged Resource ( Database connections, file handles)

13. Unload -- Releases managed Resources ( Instances created by CLR)

While excuting the page, it will go under the fallowing steps(or fires the events) which collectivly known as Page Life cycle.

Page_Init                             -- Page Initialization
LoadViewState                     -- View State Loading
LoadPostData                      -- Postback data processing
Page_Load                          -- Page Loading
RaisePostDataChangedEvent  -- PostBack Change Notification
RaisePostBackEvent             -- PostBack Event Handling
Page_PreRender                  -- Page Pre Rendering Phase
SaveViewState                   -- View State Saving
Page_Render                      -- Page Rendering
Page_UnLoad                     -- Page Unloading