Removing word or character from string followed by space or before space in c#

Question

I have a string

string name = \"AL QADEER UR AL REHMAN AL KHALIL UN\";

How would I remove all characters AL, UR,

Answer 1

var words = new[] { "AL", "UR", "UN" };
var arr = systemName.Split(new[] { " " }, StringSplitOptions.RemoveEmptyEntries).Except(words);
systemName = string.Join(" ", arr);