c# - LINQ Sum all properties -

is there elegant way this?

assume working objects have excusively numeric properties (ints , doubles), this:

foo     -bar1 int     -bar2 int     -bar3 int     -foobar1 double     -foobar2 double 

and have collection of list...is there way have sum numeric properties in list , return single object foo totals?

thanks so

it can done using one-liner :-)

item sum = (from p in typeof(item).getfields()           type.gettypecode(p.fieldtype) == typecode.int32 || type.gettypecode(p.fieldtype) == typecode.double           group p p g           select new { prop=g.key, sum=items.sum(s => (decimal)convert.changetype(g.key.getvalue(s), typecode.decimal)) })           .aggregate(new item(), (state, next) => {               next.prop.setvalue(state, convert.changetype(next.sum, next.prop.fieldtype));             return state;           }); 

complete sample:

using system; using system.linq; using system.collections.generic;  class program {     class item     {         public int bar1 = 0;         public int bar2 = 0;         public double foobar1 = 0;         public double foobar2 = 0;     }      public static void main ()     {         var items = new list<item>();         items.add(new item() { bar1 = 1, bar2 = 2, foobar1 = 1.1, foobar2 = 1.2 });         items.add(new item() { bar1 = 1, bar2 = 2, foobar1 = 1.1, foobar2 = 1.2 });         items.add(new item() { bar1 = 1, bar2 = 2, foobar1 = 1.1, foobar2 = 1.2 });          var sum = (from p in typeof(item).getfields()                   type.gettypecode(p.fieldtype) == typecode.int32 || type.gettypecode(p.fieldtype) == typecode.double                   group p p g                   select new { prop=g.key, sum=items.sum(s => (decimal)convert.changetype(g.key.getvalue(s), typecode.decimal)) })                   .aggregate(new item(), (state, next) => {                       next.prop.setvalue(state, convert.changetype(next.sum, next.prop.fieldtype));                     return state;                   });           console.writeline("bar1: " + sum.bar1);         console.writeline("bar2: " + sum.bar2);         console.writeline("foobar1: " + sum.foobar1);         console.writeline("foobar2: " + sum.foobar2);     } }