C#•12mo ago

✅ Convert List to IList

How do I convert a List to an IList?

18 Replies

jcotton42•12mo ago

List<T> implements IList<T> you can just cast it, or pass it to a method that expects IList<T>, no conversion needed

Schenk•12mo ago

but i get an error when i try to assign my a List<T> to an IList<T>, how do i get around this issue

jcotton42•12mo ago

show the $code and the error

MODiX•12mo ago

To post C# code type the following: ```cs // code here ``` Get an example by typing $codegif in chat If your code is too long, post it to: https://paste.mod.gg/

Schenk•12mo ago

here is the codesnippit

contextMessages.Add(newMessage);;

var openAiResponse = await openAiClient.GetChatCompletionsAsync(openAIModel, new ChatCompletionsOptions
{
    Messages = contextMessages // DOES NOT WORK WITH contextMessages FIX!!!!!!!!!!
});

contextMessages.Add(newMessage);;

var openAiResponse = await openAiClient.GetChatCompletionsAsync(openAIModel, new ChatCompletionsOptions
{
    Messages = contextMessages // DOES NOT WORK WITH contextMessages FIX!!!!!!!!!!
});

the error is: Error CS0200 Property or indexer 'ChatCompletionsOptions.Messages' cannot be assigned to -- it is read only

jcotton42•12mo ago

that's not a List vs IList issue that's the property not having a setter presumably you're meant to call Add or AddRange on Messages instead of reassigning it

Schenk•12mo ago

I can't call AddRange as it does not exits, and i cant ude Add as i need to a whole lot of old things to it

Denis•12mo ago

Don't hesitate to read the error message. It literally says, that what you are trying to set is readonly - you cannot assign to it Addrange is basically calling add in a loop

Schenk•12mo ago

Yes, but this works

var openAiResponse = await openAiClient.GetChatCompletionsAsync(openAIModel, new ChatCompletionsOptions
{
    Messages = { new ChatMessage(role, prompt) }
});

var openAiResponse = await openAiClient.GetChatCompletionsAsync(openAIModel, new ChatCompletionsOptions
{
    Messages = { new ChatMessage(role, prompt) }
});

Okay, then I will make my own, but why can i assign a new list and not a variable

Denis•12mo ago

Are you sure you need to assign to the messages property Click on the messages property and press F12, show a screenshot of what appears

Schenk•12mo ago

this?

Denis•12mo ago

Yes. This clearly shows that you do not set messages via the property, as it only has a get This explains the read-only error You supply the messages via the constructor Or, I would assume you store your ChatCompletionOptions in a separate variable and access its Messages property to directly add your messages there

var options = new ChatCompletionOptions();

options.Add(......);

var options = new ChatCompletionOptions();

options.Add(......);

Schenk•12mo ago

ahh, thats clever, no idea why i didn't think of that

Denis•12mo ago

And then provide the options to your GetChatCompletionOptions method

Schenk•12mo ago

yes, that makes so much more sense, thank you so much

Denis•12mo ago

Welcome, try it out It might happen that the mesaages are null But hopefully that is not the case If it is null, then you can provide the messages via the constructor As seen in the screenshot you've shared This Oh no, it is internal Then maybe there is a different constructor available

Schenk•12mo ago

okay, great, thank you so much again, it seems that it works to just save the GetChatCompletionOptions

Denis•12mo ago

Consider closing this thread using /close if you have no further questions

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✅ Convert List to IList