c# - Is it possible to add fields with invalid characters to a .net AnonymousType? -

i'm trying send json message facebook call game.achievement wanted create object using anonymoustype before posting. problem 1 of fields "game:points" (with colon). can see i've used @ prefix object field doesn't work game:points field. gets underlined in red , won't compile.

        var paramsjson = new             {                 privacy = new { value = "all_friends" },                 @object = new                 {                     app_id = "my app id",                     type = "game.achievement",                     title = "test",                     @"game:points" = 100,                     description = "test",                     image = "img.png"                 }             }; 

i've tried many varieties of @, double quotes etc. possible or need use stringbuilder this?

why don't use dictionary?

var postdata = new dictionary<string, object> {     {"game:points", 100} } 

presumably you're going have serialize object post regardless of how it's constructed. serializing json result in same structure. alternatively, other's have suggested , create class payload. can use newtonsoft indicate alternative names serialization.

public class gameachievement {    [jsonproperty("game:points")]    public int points {get; set;} }