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Editorial Team
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Asked: 2026-05-29T10:36:40+00:00

I have a query that looks like this: using (MyDC TheDC = new MyDC())

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I have a query that looks like this:

using (MyDC TheDC = new MyDC())
{
   foreach (MyObject TheObject in TheListOfMyObjects)
   {
      DBTable TheTable = new DBTable();

      TheTable.Prop1 = TheObject.Prop1;
      .....
      TheDC.DBTables.InsertOnSubmit(TheTable);

   }
   TheDC.SubmitChanges();
}

This query basically inserts a list into the database using linq-to-sql. Now I’ve read online that L2S does NOT support bulk operations.
Does my query work by inserting each element at a time or all of them in one write?

Thanks for the clarification.

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1 Answer

  1. Editorial Team

    The term Bulk Insert usually refers to the SQL Server specific ultra fast bcp based SqlBulkCopy implementation. It is built on top of IRowsetFastLoad.

    Linq-2-SQL does not implement insert using this mechanism, under any conditions.

    If you need to bulk load data into SQL Server and need it to be fast, I would recommend hand coding using SqlBulkCopy.

    Linq-2-SQL will attempt to perform some optimisations to speed up multiple inserts, however it still will fall short of many micro ORMs (even though no micro ORMs I know of implement SqlBulkCopy)

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