我在尝试连接到SQL时收到错误消息

System.TypeInitializationException: The type initializer for 'Microsoft.Practices.EnterpriseLibrary.Common.Configuration.ObjectBuilder.EnterpriseLibraryFactory' threw an exception. ---> System.IO.FileLoadException: Could not load file or assembly 'Microsoft.Practices.ObjectBuilder, Version=1.0.51205.0, Culture=neutral, PublicKeyToken=eca617d3969190ef' or one of its dependencies. The located assembly's manifest definition does not match the assembly reference. (Exception from HRESULT: 0x80131040)
   at Microsoft.Practices.EnterpriseLibrary.Common.Configuration.ObjectBuilder.EnterpriseLibraryFactory..cctor()
   --- End of inner exception stack trace ---