My strong recommendation at work is: _do not_ use configuration values such as "int dataCacheTimeMins" as these are prone to error, inflexible (cannot represent

My strong recommendation at work is: _do not_ use configuration values such as "int dataCacheTimeMins" as these are prone to error, inflexible (cannot represent 2 mins 30 seconds) and not used consistently (will be mixed in with "int dataRequestTimeoutSeconds" and "int someOtherTimeMillis" and values named _without_ explicit units). Instead always use "TimeSpan dataCacheTime" as this is more flexible: can hold values from sub-millisecond up to multiple days, and is easier to use with framework methods that will also expect this type. In other words, use the appropriate type instead of putting the duration unit name in the var.