Remove duplicate strings from a string or int array in C#

string[] spdfIn =

{ "abc", "xyz","abc", "def", "ghi", "asdf", "ghi","xd", "abc" };

spdfIn = spdfIn.Distinct().ToArray(); 

int[] int1={1,2,3,4,4,5,1};

int1=int1.Distinct().ToArray();