源“X”未在日志“Y”中注册。(它在日志“Z”中注册。)Source 和 Log 属性必须匹配，您也可以将 Log 设为空字符串，它将自动与 Source 属性匹配。

The source 'X' is not registered in log 'Y'. (It is registered in log 'Z'.) " The Source and Log properties must be matched, or you may set Log to the empty string, and it will automatically be matched to the Source property.