Was this page helpful?
Your feedback about this content is important. Let us know what you think.
Additional feedback?
1500 characters remaining
Export (0) Print
Expand All

Int64.Equals Method (Object)

Returns a value indicating whether this instance is equal to a specified object.

Namespace:  System
Assembly:  mscorlib (in mscorlib.dll)

public override bool Equals(
	Object obj
)

Parameters

obj
Type: System.Object

An object to compare with this instance.

Return Value

Type: System.Boolean
true if obj is an instance of an Int64 and equals the value of this instance; otherwise, false.

Notes to Callers

Compiler overload resolution may account for an apparent difference in the behavior of the two Equals method overloads. If an implicit conversion between the obj argument and an Int64 is defined and the argument is not typed as an Object, compilers perform an implicit conversion and call the Equals(Int64) method. Otherwise, they call the Equals(Object) method, which always returns false if its obj argument is not an Int64 value. The following example illustrates the difference in behavior between the two method overloads. In the case of the Byte, SByte, Int16, UInt16, Int32, and UInt32 values, the first comparison returns true because the compiler automatically performs a widening conversion and calls the Equals(Int64) method, whereas the second comparison returns false because the compiler calls the Equals(Object) method.

using System;

public class Example
{
   static long value = 112;

   public static void Main()
   {
      byte byte1= 112;
      Console.WriteLine("value = byte1: {0,15}", value.Equals(byte1));
      TestObjectForEquality(byte1);

      short short1 = 112;
      Console.WriteLine("value = short1: {0,15}", value.Equals(short1));
      TestObjectForEquality(short1);

      int int1 = 112;
      Console.WriteLine("value = int1: {0,17}", value.Equals(int1));
      TestObjectForEquality(int1);

      sbyte sbyte1 = 112;
      Console.WriteLine("value = sbyte1: {0,15}", value.Equals(sbyte1));
      TestObjectForEquality(sbyte1);

      ushort ushort1 = 112;
      Console.WriteLine("value = ushort1: {0,15}", value.Equals(ushort1));
      TestObjectForEquality(ushort1);

      uint uint1 = 112;
      Console.WriteLine("value = uint1: {0,17}", value.Equals(uint1));
      TestObjectForEquality(uint1);

      decimal dec1 = 112m;
      Console.WriteLine("value = dec1: {0,20}", value.Equals(dec1));
      TestObjectForEquality(dec1);

      double dbl1 = 112;
      Console.WriteLine("value = dbl1: {0,19}", value.Equals(dbl1));
      TestObjectForEquality(dbl1);
   }

   private static void TestObjectForEquality(Object obj)
   {
      Console.WriteLine("{0} ({1}) = {2} ({3}): {4}\n",
                        value, value.GetType().Name,
                        obj, obj.GetType().Name,
                        value.Equals(obj));
   }
}
// The example displays the following output: 
//       value = byte1:            True 
//       112 (Int64) = 112 (Byte): False 
// 
//       value = short1:            True 
//       112 (Int64) = 112 (Int16): False 
// 
//       value = int1:              True 
//       112 (Int64) = 112 (Int32): False 
// 
//       value = sbyte1:            True 
//       112 (Int64) = 112 (SByte): False 
// 
//       value = ushort1:            True 
//       112 (Int64) = 112 (UInt16): False 
// 
//       value = uint1:              True 
//       112 (Int64) = 112 (UInt32): False 
// 
//       value = dec1:                False 
//       112 (Int64) = 112 (Decimal): False 
// 
//       value = dbl1:               False 
//       112 (Int64) = 112 (Double): False

The following code example illustrates the use of Equals in the context of Int64, comparing two long values and returning true if they represent the same number, or false if they do not.

Int64 myVariable1 = 80;
Int64 myVariable2 = 80;

// Get and display the declaring type.
Console.WriteLine("\nType of 'myVariable1' is '{0}' and"+
     " value is :{1}",myVariable1.GetType(), myVariable1); 
Console.WriteLine("Type of 'myVariable2' is '{0}' and"+
     " value is :{1}",myVariable2.GetType(), myVariable2);

// Compare 'myVariable1' instance with 'myVariable2' Object. 
if( myVariable1.Equals( myVariable2 ) )
   Console.WriteLine( "\nStructures 'myVariable1' and "+
         "'myVariable2' are equal");
else
   Console.WriteLine( "\nStructures 'myVariable1' and "+
         "'myVariable2' are not equal");

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5, 3.0, 2.0, 1.1

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

XNA Framework

Supported in: 3.0, 2.0, 1.0

.NET for Windows Phone apps

Supported in: Windows Phone 8.1, Windows Phone Silverlight 8.1, Windows Phone Silverlight 8

Portable Class Library

Supported in: Portable Class Library
Show:
© 2015 Microsoft