Csharp/C Sharp/Development Class/Hash Code

Class behaves properly using overridden Equals and GetHashCode methods

<source lang="csharp"> using System; using System.Collections; public class GoodCompare {

 public static void Main() {
   Name president = new Name ("A", "B");
   Name first = new Name ("C", "D");
   Console.WriteLine("The hash codes for first and president are: ");
   
   if (president.GetHashCode() == first.GetHashCode())
      Console.WriteLine("equal");
   else
      Console.WriteLine("not equal");
   
 }

}

public class Name {

 protected String first;
 protected char initial;
 protected String last;
         
 public Name(String f, String l) {
   first = f; 
   last = l; 
 }
 public Name(String f, char i, String l) : this(f,l) {
   initial = i;  
 } 
 public override String ToString() {
   if (initial == "\u0000")
      return first + " " + last;
   else  
      return first + " " + initial + " " + last;
 }
 public override bool Equals(Object o) {
   if (!(o is Name))
      return false;
   Name name = (Name)o;
   return first == name.first && initial == name.initial
            && last == name.last;
 }
 public override int GetHashCode() {
   return first.GetHashCode() + (int)initial 
                            + last.GetHashCode();
 }

}

      </source>

Get the Hash code for string value

<source lang="csharp"> using System; public class HashValues {

 public static void Main( ) {    
   String[] identifiers ={"A","B","C","D","E","F","G","H","I","J","K","L"}; 
   
   for(int i = 0; i < identifiers.Length; i++) {
     String id = identifiers[i];
     int hash = id.GetHashCode();
     int code = hash % 23;
     Console.WriteLine("{0,-12}{1,12}{2,12}", id, hash, code);
   }
 }

}

      </source>