GcMultiRow gcMultiRow = this.gcMultiRow1;
var query = from Row row in gcMultiRow.Rows where row.Selected && !row.IsNewRow orderby row.Index descending select row;
foreach (var selectedRow in query)
{
gcMultiRow.Rows.RemoveAt(selectedRow.Index);
}

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GcMultiRow gcMultiRow = this.gcMultiRow1;
foreach (Row selectedRow in gcMultiRow.SelectedRows.OrderByDescending(row => row.Index))
{
if (!selectedRow.IsNewRow)
gcMultiRow.Rows.RemoveAt(selectedRow.Index);
}