Xbim.Exchange.4 (nuget): XbimTeam have changed the approach to the Nuget packages ID.  Xbim.Exchange.4 has been discontinued, but an alternative is available; the alternative package is called "Xbim.Exchange". To install it, you can proceed as follows:  Case 1: If you want to install Xbim.Exchange support from scratch in your solution. 		Search and install the "Xbim.Exchange" package instead. 		 Case 2: If you have already installed this version. 		Issue the following commands in the Package Manager Console window: 		 		Uninstall-Package Xbim.Exchange.4 –Force	 		Uninstall-Package Xbim.Geometry.4 –Force	  		 		Uninstall-Package Xbim.Essentials.4 –Force	   		 		Afterwards you should still have Xbim.Exchange package in your solution. 		 You can safely delete this file and the XbimUpdate folder in your solution.
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