Question

What is the code with the smallest number of lines that will generate a DataTable from this SQL query?

SELECT * 
FROM [Table1] 
WHERE ([Date] BETWEEN @Date1 AND @Date2) AND 
      ([Field1] IS NULL OR [Field2] IS NULL)

Answer 1

Use SqlDataAdapter to fill a DataTable.

DataTable dt = new DataTable();
using (SqlConnection yourConnection = new SqlConnection("connectionstring"))
{
    using (SqlCommand cmd = new SqlCommand("....your sql statement", yourConnection))
    {
        using (SqlDataAdapter da = new SqlDataAdapter(cmd))
        {
            da.Fill(dt);
        }
    }
}

Use using block with your SqlConnection, SqlCommand and SqlDataAdapter since they implement IDisposable interface. Also use Parameterized query