Compare this instance is equal to a specified object or Int64 in C#

The Equals() method in C# is used to compare whether the current instance of a long (Int64) is equal to a specified object or another Int64 value. This method performs value-based comparison and returns a boolean result.

Syntax

Following is the syntax for the Equals() method −

public bool Equals(long value)
public override bool Equals(object obj)

Parameters

• value − A long value to compare with the current instance.

• obj − An object to compare with the current instance.

Return Value

Returns true if the current instance equals the specified value or object; otherwise, false.

Using Equals() with Different Long Values

This example demonstrates comparing two different long values −

using System;
public class Demo {
   public static void Main() {
      long val1 = 150;
      long val2 = 240;
      Console.WriteLine("Value1 = "+val1);
      Console.WriteLine("Value2 = "+val2);
      Console.WriteLine("Are they equal? = "+val1.Equals(val2));
   }
}

The output of the above code is −

Value1 = 150
Value2 = 240
Are they equal? = False

Using Equals() with Identical Long Values

This example demonstrates comparing two identical long values −

using System;
public class Demo {
   public static void Main() {
      long val1 = 8768768768;
      long val2 = 8768768768;
      Console.WriteLine("Value1 = "+val1);
      Console.WriteLine("Value2 = "+val2);
      Console.WriteLine("Are they equal? = "+val1.Equals(val2));
   }
}

The output of the above code is −

Value1 = 8768768768
Value2 = 8768768768
Are they equal? = True

Using Equals() with Object Parameter

This example demonstrates comparing a long value with an object −

using System;
public class Demo {
   public static void Main() {
      long val1 = 500;
      object obj1 = 500L;
      object obj2 = "500";
      
      Console.WriteLine("Long value: " + val1);
      Console.WriteLine("Object 1 (long): " + obj1);
      Console.WriteLine("Object 2 (string): " + obj2);
      
      Console.WriteLine("val1.Equals(obj1): " + val1.Equals(obj1));
      Console.WriteLine("val1.Equals(obj2): " + val1.Equals(obj2));
   }
}

The output of the above code is −

Long value: 500
Object 1 (long): 500
Object 2 (string): 500
val1.Equals(obj1): True
val1.Equals(obj2): False

Conclusion

The Equals() provides a reliable way to compare long values for equality. It performs type-safe comparison when used with object parameters, returning false if the object is not a long type, making it safer than using the == operator for object comparisons.