ConfigItem Property (String, NullableGuid)

public IConfigItem this[
	string key,
	Nullable<Guid> moduleGuid = null
] { get; }

Public ReadOnly Default Property Item ( 
	key As String,
	Optional moduleGuid As Nullable(Of Guid) = Nothing
) As IConfigItem
	Get

public:
virtual property IConfigItem^ default[String^ key, Nullable<Guid> moduleGuid = nullptr] {
	IConfigItem^ get (String^ key, Nullable<Guid> moduleGuid = nullptr) sealed;
}

using AskiaPortalCmn.Configuration;

// ...
var config = Config.GetInstance();
var myModuleGuid = Guid.Parse("0c3845fd-2465-42ca-84ba-3ab39e521098");
Console.WriteLine("The value of `myModule``key1` is `{0}`", config["key1", myModuleGuid].ValueAsString);