Static members of System.Object: object.Equals : System.Object « Class « C# / CSharp Tutorial

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C# / CSharp Tutorial » Class » System.Object 
7.47.3.Static members of System.Object: object.Equals
using System;
using System.Text;

class Person
{
    public Person(string fname, string lname, string ssn, byte a)
    {
    FirstName = fname;
    LastName = lname;
    SSN = ssn;
    age = a;
    }

  public string FirstName;
  public string LastName;
  public string SSN;
  public byte age;

  public override bool Equals(object o)
  {
    Person temp = (Person)o;
    if(temp.FirstName == this.FirstName &&
       temp.LastName == this.LastName &&
       temp.SSN == this.SSN &&
       temp.age == this.age)
    {
      return true;
    }
    else
      return false;
  }

  public override string ToString()
  {
    StringBuilder sb = new StringBuilder();
          sb.AppendFormat("[FirstName= {0}"this.FirstName);
          sb.AppendFormat(" LastName= {0}"this.LastName);
          sb.AppendFormat(" SSN= {0}"this.SSN);
          sb.AppendFormat(" Age= {0}]"this.age);

    return sb.ToString();
  }

  public override int GetHashCode()
  {
    return SSN.GetHashCode();
  }
}


class MainClass
{
    public static void Main(string[] args)
    {
    Person p1 = new Person("A""B""222-22-2222"98);
    Person p2 = new Person("A""B""222-22-2222"98);

        Console.WriteLine("P3 and P4 have same state: {0}", object.Equals(p1, p2));
    }
}
P3 and P4 have same state: True
7.47.System.Object
7.47.1.Methods of the object Class
7.47.2.Using Methods inherited from the System.Object class: ToString, GetType, GetHashCode, Equals, ReferenceEquals
7.47.3.Static members of System.Object: object.Equals
7.47.4.Static members of System.Object: object.ReferenceEquals
7.47.5.Call object.Equals to compare objects
7.47.6.Use the inherited Object methods: Equals
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