c# string Trim doesn't work, a weird problem

I have string like that:

string val = 555*324-000

now, I need to remove * and - chars, so I use that code (based on MSDN)

char[] CharsToDelete = {'*', '(', ')', '-', '[', ']', '{', '}' };
string result = val.Trim(CharsToDelete);

but the string remains the same. What's the reason ?

Trim ...Removes all leading and trailing occurrences of a set of characters specified in an array from the current String object. You should use Replace method instead.

Because Trim() will remove any character in CharsToDelete at the beginning and at the end of the string.

You should use val.Replace() function.

The correct way to do this would be

string val = 555*324-000
char[] CharsToDelete = {'*', '(', ')', '-', '[', ']', '{', '}' };

foreach (char c in CharsToDelete)
{
  val = val.Replace(c, '');
}