C#「Multiple assemblies with equivalent identity have been imported」錯誤

背景：解決方案中已有4個.net4的項目 在整合項目到解決方案時，突然報Multiple assemblies with equivalent identity have been imported錯誤，說packages和.NET 4.5中的DLL衝突 CS1703 Multiple assemblies with equivalent identity have been imported:

>>阅读原文<<