By default, the subordinate document is considered dirty if the parent is dirty.
Namespace:  Microsoft.VisualStudio.Modeling.Shell
Assembly:  Microsoft.VisualStudio.Modeling.Sdk.Shell.12.0 (in Microsoft.VisualStudio.Modeling.Sdk.Shell.12.0.dll)
Syntax
'Declaration
Public Overrides Function IsDocDataDirty ( _
    <OutAttribute> ByRef isDirty As Integer _
) As Integer
public override int IsDocDataDirty(
    out int isDirty
)
public:
virtual int IsDocDataDirty(
    [OutAttribute] int% isDirty
) override
abstract IsDocDataDirty : 
        isDirty:int byref -> int  
override IsDocDataDirty : 
        isDirty:int byref -> int
public override function IsDocDataDirty(
    isDirty : int
) : int
Parameters
- isDirty
Type: System.Int32% 
Return Value
Type: System.Int32
Implements
IVsPersistDocData2.IsDocDataDirty(Int32%)
IVsPersistDocData.IsDocDataDirty(Int32%)
.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.