Why show me error when i convert JSON to string in C#

Question

My code is here for converting JSON to string in C#

here is my class

public class Datum
{
    public string quantity { get; set; }
    public string price { get; set; }
    public string name { get; set; }
}
public class TableDetails
{     
    public List<Datum> Data { get; set; }
    public string TableName { get; set; }
}

}

here i parse this

TableDetails table = 
    JsonConvert.DeserializeObject<TableDetails>(context.DataFrame.ToString());

Error is here

{"Error converting value \"[{\"quantity\":\"1\",\"price\":\"350\",\"name\":\"Thai Fried Chicken\"}]\" to type 'System.Collections.Generic.List`1[AlchameyWebsoket.Datum]'. Path 'Data', line 1, position 82."}

I send this string from an android app here is the code i use in android

try{

                    JSONObject mainObj=new JSONObject();

                    JSONArray arr=new JSONArray();
                    for(int i=0;i<Memory.finalOrder.size();i++)
                    {
                        JSONObject jo = new JSONObject();
                        jo.put("name",Memory.finalOrder.get(i).getName());
                        jo.put("quantity",Memory.finalOrder.get(i).getQuantity());
                        jo.put("price",Memory.finalOrder.get(i).getPrice());

                        arr.put(jo);
                    }

                    mainObj.put("TableName",Memory.tableName);
                    mainObj.put("Data",arr.toString());

Please help me out of this problem

can you share your Json string. It seems that your JSON string have some issue — Shobhit Walia, Jul 28 '16 at 18:12
{"Data":"[{\"quantity\":\"1\",\"price\":\"325\",\"name\":\"Nachos(Beef)\"},{\"quantity\":\"1\",\"price\":\"395\",\"name\":\"Hot Buffalo Wings\"}]","TableName":"Table 1"} — amit ghosh, Jul 28 '16 at 18:19
I send this string from an android app here is the code http://codepaste.net/h1eowa — amit ghosh, Jul 28 '16 at 18:21
@ShobhitWalia I made a mistaken assumption based on the JSON quoted in the error string he pasted. — 15ee8f99-57ff-4f92-890c-b56153, Jul 28 '16 at 18:27
when i receive the json string it contains some back slash (\) in Data array automatically — amit ghosh, Jul 28 '16 at 18:27
@amitghosh Is that the actual JSON? Does `context.DataFrame.ToString()` return that actual exact string with all the escaped quotes? What you pasted in the comment looks like `Data` is a string which contains an escaped JSON string, rather than a actual JSON array definition. — 15ee8f99-57ff-4f92-890c-b56153, Jul 28 '16 at 18:28
here is the exception https://www.dropbox.com/s/8kt47gu9fqw7ssb/Capture.PNG?dl=0 — amit ghosh, Jul 28 '16 at 18:30
escaped quotes are automatically added when i receive this string . I use alchemy websockets for receiving data — amit ghosh, Jul 28 '16 at 18:35
Thanks guys ... I solve the problem just replace a line of java code before mainObj.put("Data",arr.toString()); after mainObj.put("Data",arr); for toString(); method its added some escaped operator — amit ghosh, Jul 28 '16 at 18:57

Why show me error when i convert JSON to string in C#

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