>Maybe:
>

public static object GetDefault(Type t)
>        {
>            if (t.IsValueType)
>            {
>                return Activator.CreateInstance(t);
>            }
>            return null;
>        }

then:

var passedObject = SafeConvert(passedValue, GetDefault(columnType));

>
>
>
>>>Do you seem how can we replace Convert.ChangeType with SafeConvert in this code
>>>
>>>

>>> foreach (KeyValuePair<String, String> kvp in rowValues)
>>>         {
>>>            String passedValue = kvp.Value;
>>>            var columnValue = bookingRow[kvp.Key];
>>>            Type columnType = ((DataColumn)bookingRow[kvp.Key]).DataType;
>>>
>>>            var passedObject = Convert.ChangeType(passedValue, columnType);
>>>            if (passedObject.Equals(columnValue) == false)
>>>            {
>>>               String cColumnValue = columnValue.ToString().Trim();
>>>               if (cColumnValue!=passedValue) // Double check to prevent cases of "" vs. "          "
>>>                  this.SaveToBookingHistory(booking_id, "M", kvp.Key, cColumnValue, passedValue, ref messageText, ref statusCode);
>>>            }
>>>         }

>>
>>
>>See my other answer

I may be wrong, but I think that results in the equivalent of

var passedObject = SafeConvert<object>(passedValue, GetDefault(columnType));

so passedValue would be boxed as an object instead of converted to the appropriate type, and the comparison would still fail.