Now I am trying to verify and repair connectivity in geometric network. I use interface IGeometricNetworkConnectivity2 with method RebuildConnectivity and CheckAndRepairConnectivity2 to determine inconsistancies connectivity. But, I don't know how to code to constrain the connectivity veryfication to current display extent. By side that, I use interface IGeometricNetworkErrorDetection with method DetectNetworkErrors to determine inconsistances connectivity, too. It is right, isn't it ? And what is difference between them ?