Can't append to collection of type ICollection<String>

[tarau_bianca]

I am using the Append to Collection activity, and I get this error compiling error:

This is my collection variable that I am trying to append to:

This is the Item I am trying to append to the collection:

And this is the activity

It seems like the output result allows only List variable. Do I need to convert from ICollection to List? Or what should I do?

[ppr (Peter Preuss)]

2022.10.3 / windows: Append item to collection new activity does not work like the activity before

Thanks for the details: A similar setup: [grafik] we do have following activities: [grafik] Append item to List: [grafik] [grafik] we do have the typeArgument Append item to Collection: [grafik] here the typeArgument is derived from the settings. We do adapt by: regulating the datataype of given collection the items are of the derived datatype the returned result will be a List of the datatype which was derived We recommend not to use CTRL+K within the differen fields. Instead use …

Ensure that AttachmentList is of datatype: List(Of String)

[RajKumar_DC (RajKumar Durai)]

Hi @tarau_bianca,

Hope this post will help you

try with system.collections.generic.List<system.string> Variable

Not “Add To Collection” in Activity Panel and What to use instead “Add To Collection” Activity in Newupdate(2022.10.3)

Yes I know this is simple but I hope some people find it useful. I am posting this answer as this question keeps coming up since the new update (2022.10.3). Questions Not “Add To Collection” in Activity Panel What to use instead “Add To Collection” Activity in Newupdate(2022.10.3) The answer to both these questions is the same Add To Collection Old (2022.4.6) [image] [image] Variable type is “system.collections.generic.List<system.string>” Append item to collection New (2022.10.3) We …

Thanks,
Rajkumar

[tarau_bianca]

Well then it won’t be the same thing as using the “Append to List” activity? What is the difference between this two then, if both use lists?

[ppr (Peter Preuss)]

@tarau_bianca

What is the difference between this two then, if both use lists?

when provided which is dependend to the selectedTargetFramework as activity:

• Append Item toList - adds 1 item to the List and is directly adding it to the same list object
• Append Item to Collection - can add 1 or more items to a list, but will return a new fresh list on which the origin and the items to add are concatenated

As also mentioned in the link (when a not direct addition is needed, and only one item is to add)

Assign Activity:
myList = myList.Append(“MyOtherStringItem”).toList

[HowTo] LINQ - First Start # Concat | Append | Prepend Operator

This HowTo gives an introductory overview of the conjunction operators: Concat, Append, Prepend Introduction The conjunction operators are used to add the item(s) to a particular set of items. Concat, Append, Prepend Operator The Concat Operator combines a set of items with another set of items The Append Operator adds an item to a set of items on the end The Prepend Operator adds an item to a set of items on the begin Overview I – Input P – Processing O – Output {"A","B"} / {"…

or for multiple items
myCollection1.Concat(myCollection2).toList