linq - How to remove list element? -

i have 2 lists below.

list<string> apple= new list<string>();   apple.add("a");   apple.add("b");  list<string> ball= new list<string>();   ball.add("a,b");   ball.add("b,c");   ball.add("c,a"); 

now want remove elements ball list of there substrings of elements in apple list. if "a" occurs in ball list element, have remove listelements ball list.

my expected output of ball list should (b,c).

here quick linqpad

var apple= new list<string>(); apple.add("a");  var ball= new list<string>(); ball.add("a,b"); ball.add("b,c"); ball.add("c,a");  ball.where(b=>apple.any(b.contains))     .tolist() //create duplicate, lists have foreach     .foreach(b=>ball.remove(b));  ball.dump(); 

output is:

b,c