Merge pull request dotnet#127 from BethMassi/master

Add samples for LINQ GroupBy

Author: BethMassi

samples/linq/csharp/grouping/AnagramEqualityComparer.cs

@@ -0,0 +1,27 @@
+using System;
+using System.Collections.Generic;
+
+namespace Grouping
+{
+    //Comparer that matches words that are anagrams of each other.
+    public class AnagramEqualityComparer : IEqualityComparer<string>
+    {
+        public bool Equals(string x, string y)
+        {
+            return getCanonicalString(x) == getCanonicalString(y);
+        }
+
+        public int GetHashCode(string obj)
+        {
+            return getCanonicalString(obj).GetHashCode();
+        }
+
+        private string getCanonicalString(string word)
+        {
+            char[] wordChars = word.ToCharArray();
+            Array.Sort<char>(wordChars);
+            return new string(wordChars);
+        }
+    }
+}
+

samples/linq/csharp/grouping/Customer.cs

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+using System.Collections.Generic;
+
+namespace Grouping
+{
+    public class Customer
+    {
+        public int CustomerId { get; set; }
+        public string CustomerName { get; set; }
+        public string Address { get; set; }
+        public string City { get; set; }
+        public string PostalCode { get; set; }
+        public string Country { get; set; }
+        public string Phone { get; set; }
+        public IEnumerable<Order> Orders { get; set; } = new List<Order>();
+    }
+}