Dim instance As BaseInstanceState
Dim context As FilterContext
Dim typeDefinitionId As NodeId
Dim relativePath As IList(Of QualifiedName)
Dim attributeId As UInteger
Dim indexRange As NumericRange
Dim value As Object
 
value = instance.GetAttributeValue(context, typeDefinitionId, relativePath, attributeId, indexRange)

public virtual object GetAttributeValue( 
   FilterContext context,
   NodeId typeDefinitionId,
   IList<QualifiedName> relativePath,
   uint attributeId,
   NumericRange indexRange
)