Please allow more C# libraries for arithmetic expressions.
Currently (Version 7.10), it is very hard to work with Lists/Arrays/Keywords which contain values which are not of Type String.

For example, when retrieving a List of decimal values via external data (SQL), this can only be stored into a keyword field, which is always handled as an array of string.

The available LINQ functions do not allow to use sum, max, min etc. functions, because these depend on a numeric data type.

Converting the string[] to a decimal[] or int[] is also not possible because no methods or classes which provide these functions are supported, for example Array.ConvertAll() would be a possibility, or using the Convert library inside a lambda expression (which is supported almost nowhere).

Also, most of this would be way easier if we could create keywords of other data types - for example a keyword<decimal>.