Set the flag to delay showing of mini-warning dialog (if one is to be shown as a result of warnings in the current transaction) till the end of next transaction. 
   Namespace:   Autodesk.Revit.DB  
  Assembly:   RevitAPI  (in RevitAPI.dll) Version: 2015.0.0.0 (2015.0.0.0) 
  Since:  2011 
Syntax
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Parameters
- bFlag
 -  Type:  System Boolean  
 
Remarks
 This controls mini-warnings only; does not make sense in modal mode setting it to true will postpone clearing mini-warning dialogs until the next transaction is finished.