ForEach($project in get-project -all) {
 ForEach($package in Get-Package -ProjectName $project.ProjectName | ?{ $_.Id -like 'Abp*'}) {
  Update-Package -ProjectName $project.ProjectName -Id $package.Id;} }

AbpBootstrapper.IocManager.IocContainer.AddFacility<LoggingFacility>(
    f => f.UseLog4Net().WithConfig("log4net.config")
);

LogConfig("log4net.config");

private void LogConfig(string configFileName)
    {
        var log4NetConfig = System.IO.Path.Combine(HostingEnvironment.ApplicationPhysicalPath, configFileName);
        if (System.IO.File.Exists(log4NetConfig))
            AbpBootstrapper.IocManager.IocContainer.AddFacility<LoggingFacility>(
                f => f.UseAbpLog4Net().WithConfig(log4NetConfig)
            );
    }