You didn't specify a version of Common.Logging but I assumed and based it on 2.1.
I think you could do this by implementing Common.Logging.IConfigurationReader, something similar to what follows:
Imports System.Xml
Public Class ConfigReader
Implements Common.Logging.IConfigurationReader
Private _configPath As String
Public Sub New(configPath As String)
_configPath = configPath
End Sub
Public Function GetSection(sectionName As String) As Object Implements Common.Logging.IConfigurationReader.GetSection
Dim xmlDoc As New XmlDocument()
xmlDoc.Load(_configPath)
Return (New Common.Logging.ConfigurationSectionHandler()).Create(Nothing, Nothing, xmlDoc.SelectSingleNode("configuration/" & sectionName))
End Function
End Class
Then at application start you can call
Common.Logging.LogManager.Reset(New ConfigReader(pathToConfigFile))
Granted this will only work if you have one config file with all your parameters and it uses the same format as standard Common.Logging stuff. Otherwise you'll probably have to do a bunch of manually config file parsing or database calls depending on where your configuration parameters are coming from.