Typed Dataset - DateTime column value null in database

Question

This is the code generated by the designer:

[global::System.Diagnostics.DebuggerNonUserCodeAttribute()]
            public System.DateTime dcDateOfPayment {
                get {
                    try {
                        return ((global::System.DateTime)(this[this.tabledtAllInvoices.dcDateOfPaymentColumn]));
                    }
                    catch (global::System.InvalidCastException e) {
                        throw new global::System.Data.StrongTypingException("The value for column \'dcDateOfPayment\' in table \'dtAllInvoices\' is DBNull.", e);
                    }
                }
                set {
                    this[this.tabledtAllInvoices.dcDateOfPaymentColumn] = value;
                }
            }

Whenever the value is null it goes into the catch and then the exception is re thrown. Right now I modify the designer file every time it is regenerated. But its quite pain and sometimes I forget.

Any way around this?

Thanks.