Creating SharePoint 2010 Calculated Field from code in sites with different regional settings

Say you need to create the following calculated column in different sites that have different regional settings: English, French, etc. to format the DateTime [Start Time] filed to "dd-mm-yyyy".

The following formula would look list this in English - with a comma separator:

=TEXT([Start Time],"dd-mm-yyyy")

Like this in french - with a semicolon separator:

=TEXT([Start Time];"dd-mm-yyyy")

When creating the column from from code  behind to treat this  the SPWeb.Locale.TextInfo.ListSeparator property must be used to get the correct list separator:

SPList spList = SPContext.Current.Web.Lists["List Title"];
string newFieldName = spList.Add("CalculatedField", SPFieldType.Calculated, false);
SPFieldCalculated newField = (SPFieldCalculated)spList.GetField(newFieldName);
newField.Formula = String.Format(@"=TEXT([Start Time]{0} ""dd-mm-yyyy"")", SPContext.Current.Web.Locale.TextInfo.ListSeparator);
newField.Update();