CaseConversion is a property of the BaseBusinessObject, and it is used to specify if the StringField objects should convert the case of the string values. There are three possible values for this setting None, Upper, and Lower. If None is specified or then the business object does not change the case of any string values, however if Upper or Lower is specified all string values will be converted to upper or lower case respectively before saving, searching or after loading their values from the database.
<appSettings>
<add key="CaseConversion" value="UPPER" />
</appSettings>
As per the above example, the all business objects will automatically convert any string values to upper case. This can be very useful if you are working with a case sensitive database and you would like to store all your data in UPPER or LOWER case, and also you would like the search functions to be case insensitive also.