Hi @Raja.G
You can use 2 datatables are:
dt_Valid=dt_Input.AsEnumerable().Where(Function(row) System.Text.RegularExpressions.Regex.IsMatch(row(“yyy”).ToString(),
“(00[234]\d{4}$)|([234]\d{4}$)”)).CopyToDataTable()
dt_Invalid=dt_Input.AsEnumerable().Where(Function(row) Not System.Text.RegularExpressions.Regex.IsMatch(row(“yyy”).ToString(),
“(00[234]\d{4}$)|([234]\d{4}$)”)).CopyToDataTable()
And then use them to write in different sheets.
Hoping this will be of use
Thank you