How to insert 5 lac record into sql server

DataTable mydatatable= mydata;
 // Get a reference to a single row in the table.
 DataRow[] rowArrayMydata = mydatatable.Select();

using (SqlBulkCopy bulkCopy = new SqlBulkCopy(con,    SqlBulkCopyOptions.KeepIdentity, transaction))
{

bulkCopy.DestinationTableName = "MyDestinationTable";
 // Write the array of rows to the destination.
 bulkCopy.WriteToServer(rowArrayMydata );

 }