Insert value dynamically in Json object in existing key

**Below code output**: I am able to get json as below by this code

{

"ContainerId": "848dc1ca-04ae-457e-b6ac-0dee454816c4",

"ContainerName": "Container1"

}

**Needed Output**: But I want to insert value dynamically like below json in array that contains multiple container ID and Container Name

I have to make json like this

{

"ContainerId": ["848dc1ca-04ae-457e-b6ac-0dee454816c4",

"aj8dc1ca-04ae-457e-b6ac-0dee454816c4"],

"ContainerName": ["Container1","Container2"]

}

This is the code which for reference, Please let me know how I can do this in C#

var jsonDiaptchObject = JObject.Parse(stockItem.Payload);

var oldDispatchItem = await _stockItemService.GetStockItemFor(stockItem.Identifier);

foreach (var dispatchItem in packItemRequest.DispatchItems)

{

containerid = Guid.NewGuid();

KeyValuePair[] propertyDispatchs = new KeyValuePair[]

{

new KeyValuePair("ContainerId", containerid.ToString()),

new KeyValuePair("ContainerName", dispatchItem.Container.ToString())

};

string olddispatchValue = null;

foreach (var propertyDispatch in propertyDispatchs)

{

if (jsonDiaptchObject.ContainsKey(propertyDispatch.Key))

{

olddispatchValue = JObject.Parse(stockItem.Payload) [propertyDispatch.Key]?.ToString();

//jsonDiaptchObject.Add(propertyDispatch.Key.Insert(0, propertyDispatch.Value));

}

jsonDiaptchObject.Add(propertyDispatch.Key, propertyDispatch.Value);

}

stockItem.Payload = jsonDiaptchObject.ToString();

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