score:2
Accepted answer
actually, it fails for age too:
expression of type 'system.int32' cannot be used for return type 'system.object'
the immediate issue is that you need a conversion (a box in this case) from a value-type to an object:
var mysortexpression = expression.lambda<func<objecttoorder, object>>(
expression.convert(
expression.property(param, field),
typeof(object)
), param);
however, using object here could in-and-of-itself be problematic. i suggest looking at dynamic linq orderby on ienumerable<t>
Source: stackoverflow.com
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