Use of distinct of LINQ

 1         public class Product 2         { 3             public string Name { get;set;} 4             public int Code { get; set; } 5         } 6         class ProductComparet : IEqualityComparer<Product> 7         { 8             public bool Equals(Product x, Product y) 9             {10                 if (object.ReferenceEquals(x,y))11                 {12                     return true;13                 }14                 if (object.ReferenceEquals(x,null)||object.ReferenceEquals(y,null))15                 {16                     return false;17                 }18                 return x.Code == y.Code && x.Name == y.Name;19             }20 21             public int GetHashCode(Product product)22             {23                 if (object.ReferenceEquals(product, null))24                 {25                     return 0;26                 }27                 int hashProductName = product.Name == null ? 0 : product.Name.GetHashCode();28 29                 int hashProductCode = product.Code.GetHashCode();30                 return hashProductName ^ hashProductCode;31 32             }33         }

View code

 

        static void Main(string[] args)        {               Product[] products = { new Product { Name = "apple", Code = 9 },                        new Product { Name = "orange", Code = 4 },                        new Product { Name = "apple", Code = 9 },                        new Product { Name = "lemon", Code = 12 } };            IEnumerable<Product> noduplicates = products.Distinct(new ProductComparet());            foreach (var item in noduplicates)            {                Console.WriteLine(item.Name+" "+item.Code);            }        }