In order to use the REGEXP extension, it must be enabled first (i.e. since it is
an extension).  The following C# code snippet shows roughly what is required:

<verbatim>
  using (SQLiteConnection conn = new SQLiteConnection())
  {
      conn.ConnectionString = "Data Source=:memory:;";
      conn.Open();
      conn.EnableExtensions(true);
      conn.LoadExtension("SQLite.Interop.dll", "sqlite3_regexp_init");


      Further code here...

  }
</verbatim>