Is there a way to concat C# anonymous types? -

for example

var hello = new { hello = "hello" }; var world = new { world = "world" }; var helloworld = hello + world; console.writeline(helloworld.tostring()); //outputs {hello = hello, world = world} 

is there way make work?

no. hello , world objects objects of different classes.

the way merge these classes use dynamic type generation (emit). here example of such concatenation: http://www.developmentalmadness.com/archive/2008/02/12/extend-anonymous-types-using.aspx

quote mentioned article:

the process works this: first use system.componentmodel.getproperties propertydescriptorcollection anonymous type. fire reflection.emit create new dynamic assembly , use typebuilder create new type composite of properties involved. cache new type reuse don't have take hit of building new type every time need it.