If NorthwindDataSet1.HasChanges() Then

    ' Changed rows were detected, add appropriate code.
Else
    ' No changed rows were detected, add appropriate code. 
End If

if (northwindDataSet1.HasChanges()) 
{
    // Changed rows were detected, add appropriate code.
}
else
{
    // No changed rows were detected, add appropriate code.
}

if (northwindDataSet1.HasChanges())
{
    // Changed rows were detected, add appropriate code.
}
else
{
    // No changed rows were detected, add appropriate code.
}

If NorthwindDataSet1.HasChanges(DataRowState.Added) Then

    ' New rows have been added to the dataset, add appropriate code.
Else
    ' No new rows have been added to the dataset, add appropriate code.
End If

if (northwindDataSet1.HasChanges(DataRowState.Added)) 
{
    // New rows have been added to the dataset, add appropriate code.
}
else
{
    // No new rows have been added to the dataset, add appropriate code.
}

if (northwindDataSet1.HasChanges(DataRowState.Added))
{
    // New rows have been added to the dataset, add appropriate code.
}
else
{
    // No new rows have been added to the dataset, add appropriate code.
}