Dheeraj's Tech Wiki

LINQ can be used to perform query operations on objects which implement the IEnumerable<T>. Since the String class implements the IEnumerable<char> interface we can perform various string operations using LINQ. In the below example I have used LINQ to extract the common characters in two strings.

Note: For some weired reason Visual Studio doesn't show the LINQ extension methods in the intellisense for string objects.

string str1 = "abc";
 string str2 = "bcd";

Func match = (s,c) => s.Contains(c);

 var chars = from c in str1
             where match(str2, c)
             select c;

 foreach (var c in chars)
  {
    Console.WriteLine(c);
  }
 Console.Read();