String.TrimEnd() method only seems to work with the example

this is the example from the helpfile and it works:

Code:

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Dim MyString As String = "Hello, World!"
Dim MyChar As Char() =  {"y"c, ","c}
Dim NewString As String = MyString.TrimEnd(MyChar)
Console.WriteLine(NewString)

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here is my code which is modeled exactly from the example. it doesn't work:

Code:

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Dim MyString As String = "floorboards, "
        Dim MyChar As Char() = {"r"c, "o"c, "W"c, "l"c, "d"c, "!"c, " "c}
        Dim NewString As String = MyString.TrimEnd(MyChar)
        Console.WriteLine(NewString)

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i don't see what the problem w/ my code is.