If you want to concatenate all items in a generic List<string> in C# you can use the following code:


List<string> itemsInGenericList = new List<string>
    "Item 1",
    "Item 2",
    "Item 3",
    "Item 4"

// Convert generic list of strings to an array of strings.
string[] itemsInArray = itemsInGenericList.ToArray();

// Convert an array of strings to one string.
string itemsInString = string.Join(Environment.NewLine, itemsInArray);

// Convert an array of strings to a generic list of strings.
itemsInGenericList = new List<string>(itemsInArray);



Item 1

Item 2

Item 3

Item 4

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