Compare two strings and get the difference

Question

How can i compare two strings in c# and gets the difference?

for example:

String1 : i have a car

string2 : i have a new car bmw

result: new, bmw

Answer 1

You need to make sure the larger set is on the left hand side of the Except (not sure if there is a pure Linq way to achieve that):

    static void Main(string[] args)     {         string s1 = "i have a car a car";         string s2 = "i have a new car bmw";          List<string> diff;         IEnumerable<string> set1 = s1.Split(' ').Distinct();         IEnumerable<string> set2 = s2.Split(' ').Distinct();          if (set2.Count() > set1.Count())         {             diff = set2.Except(set1).ToList();         }         else         {             diff = set1.Except(set2).ToList();         }     } 

Answer 2

Based off your question (It is a bit vague.) this should work.

var first = string1.Split(' '); var second = string2.Split(' '); var primary = first.Length > second.Length ? first : second; var secondary = primary == second ? first : second; var difference = primary.Except(secondary).ToArray(); 

At the top of your file make sure you include:

using System.Linq;