Exception: the method .. (in Bot emulator)

When i am trying to test the bot in emulator and calling oil_details intent which is simply adding the product in the cart(which i defined it as a list), it is showing the text

 

"Exception: The method or operation is not implemented.

Please help me out of this situation. Cant even figure out if the product is added in the adding_to_cart() function which i defined in another class AllMethods. And also not understanding what is wrong in the code. Thanks in advance.

 

[LuisIntent("oil_details")]

public async Task oil(IDialogContext context, LuisResult result)

{

DataTable final_table = new DataTable();

final_table.Columns.Add("Product_name", typeof(String));

final_table.Columns.Add("Price", typeof(int));

final_table.Rows.Add("L****", 500);

final_table.Rows.Add("L****_cream", 400);

final_table.Rows.Add("L****_oil", 800);

final_table.Rows.Add("colour_black_hair", 600);

final_table.Rows.Add("colour_blue_hair", 700);

string o = final_table.Rows[2]["Price"].ToString();

await context.PostAsync("L**** Oil for Dry hair.");

var message = context.MakeMessage();

var thumb = new HeroCard

{

Title = "L****  Oil",

Subtitle = "Rs 800",

Text = "df",

Images = new List { new CardImage("C:/Users/ISAdmin/Pictures/hair/product_details.jpg") },

Buttons = new List { new CardAction(ActionTypes.ImBack, "Add to Cart", value: "Add to Cart.") }

};

var attachment = thumb.ToAttachment();

message.Attachments.Add(attachment);

await context.PostAsync(message);

AllMethods adding = new AllMethods();

adding.adding_to_cart(o);

context.Done