There was a conflict between
解读，首先搜索到第一个5>的开头的那一行，确认是在编译哪一个项目。
那么后面的冲突，就是在和这个项目冲突。
There was a conflict between "log4net, Version=1.2.15.0, Culture=neutral, PublicKeyToken=669e0ddf0bb1aa2a" and "log4net, Version=1.2.10.0, Culture=neutral, PublicKeyToken=1b44e1d426115821".
5> "log4net, Version=1.2.15.0, Culture=neutral, PublicKeyToken=669e0ddf0bb1aa2a" was chosen because it was primary and "log4net, Version=1.2.10.0, Culture=neutral, PublicKeyToken=1b44e1d426115821" was not.
5> References which depend on "log4net, Version=1.2.15.0, Culture=neutral, PublicKeyToken=669e0ddf0bb1aa2a" [D:\ChuckLu\Git\Edenred\LISA_5.0.0.0\LibraryV70\log4net.dll].
5> D:\ChuckLu\Git\Edenred\LISA_5.0.0.0\LibraryV70\log4net.dll
5> Project file item includes which caused reference "D:\ChuckLu\Git\Edenred\LISA_5.0.0.0\LibraryV70\log4net.dll".
5> log4net
5> References which depend on "log4net, Version=1.2.10.0, Culture=neutral, PublicKeyToken=1b44e1d426115821" [].
5> D:\ChuckLu\Git\Edenred\LISA_5.0.0.0\LibraryV70\DotNetOpenAuth.dll
5> Project file item includes which caused reference "D:\ChuckLu\Git\Edenred\LISA_5.0.0.0\LibraryV70\DotNetOpenAuth.dll".
5> There was a conflict between "log4net, Version=1.2.15.0, Culture=neutral, PublicKeyToken=669e0ddf0bb1aa2a" and "log4net, Version=2.0.8.0, Culture=neutral, PublicKeyToken=669e0ddf0bb1aa2a".
5> "log4net, Version=1.2.15.0, Culture=neutral, PublicKeyToken=669e0ddf0bb1aa2a" was chosen because it was primary and "log4net, Version=2.0.8.0, Culture=neutral, PublicKeyToken=669e0ddf0bb1aa2a" was not.
5> References which depend on "log4net, Version=1.2.15.0, Culture=neutral, PublicKeyToken=669e0ddf0bb1aa2a" [D:\ChuckLu\Git\Edenred\LISA_5.0.0.0\LibraryV70\log4net.dll].
5> D:\ChuckLu\Git\Edenred\LISA_5.0.0.0\LibraryV70\log4net.dll
5> Project file item includes which caused reference "D:\ChuckLu\Git\Edenred\LISA_5.0.0.0\LibraryV70\log4net.dll".
5> log4net
5> References which depend on "log4net, Version=2.0.8.0, Culture=neutral, PublicKeyToken=669e0ddf0bb1aa2a" [D:\ChuckLu\Git\Edenred\LISA_5.0.0.0\LISA.Common\bin\Debug\log4net.dll].
5> D:\ChuckLu\Git\Edenred\LISA_5.0.0.0\LISA.Common\bin\Debug\LISA.Common.dll
