C# how to copy all elements in array to clipboard?

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C#

clipboard

I have a program that outputs the test results to the array. I want to create a button that would allow users to copy all values from the array (ints) to the clipboard, so when you paste them somewhere, they will be pasted the way they were in the program (column). Like this:

215
234
157
245

It would be ideal if when the user pastes it into Exel, elements would be stored in the column, where is each value stored in the individual cell.

What I have tried:

Tried to use the suggestion from StackOverflow, and the code looks like this:

foreach (object value in trueBenchScoreList)
                clipData.AppendLine(value.ToString());

But it doesn't work as expected