Subordinate files are assumed to have some "parent" DocData object that usually handles actual serialization Save operation is a no-op except in the case of SaveAs.
Namespace:  Microsoft.VisualStudio.Modeling.Shell
Assembly:  Microsoft.VisualStudio.Modeling.Sdk.Shell.12.0 (in Microsoft.VisualStudio.Modeling.Sdk.Shell.12.0.dll)
Syntax
'Declaration
Protected Overrides Sub Save ( _
    fileName As String _
)
protected override void Save(
    string fileName
)
protected:
virtual void Save(
    String^ fileName
) override
abstract Save : 
        fileName:string -> unit  
override Save : 
        fileName:string -> unit
protected override function Save(
    fileName : String
)
Parameters
- fileName
Type: System.String 
.NET Framework Security
- Full trust for the immediate caller. This member cannot be used by partially trusted code. For more information, see Using Libraries from Partially Trusted Code.