/logger: Use this logger to log events from MSBuild. To specify multiple loggers, specify each logger separately. The syntax ...

/logger:   Use this logger to log events from MSBuild. To specify
                     multiple loggers, specify each logger separately.
                     The  syntax is:
                       [,][;]
                     The  syntax is:
                       [.]
                     The  syntax is:
                       {[,] | }
                     The  are optional, and are passed
                     to the logger exactly as you typed them. (Short form: /l)
                     Examples:
                       /logger:XMLLogger,MyLogger,Version=1.0.2,Culture=neutral
                       /logger:XMLLogger,C:\Loggers\MyLogger.dll;OutputAsHTML