Int64.Equals Method (Int64)


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Returns a value indicating whether this instance is equal to a specified Int64 value.

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

Public Function Equals (
	obj As Long
) As Boolean


Type: System.Int64

An Int64 value to compare to this instance.

Return Value

Type: System.Boolean

true if obj has the same value as this instance; otherwise, false.

This method implements the System.IEquatable(Of T) interface, and performs slightly better than Equals because it does not have to convert the obj parameter to an object.

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.

Module Example
   Dim value As Int64 = 112

   Public Sub Main()
      Dim byte1 As Byte = 112
      Console.WriteLine("value = byte1: {0,15}", value.Equals(byte1))

      Dim short1 As Short = 112
      Console.WriteLine("value = short1: {0,15}", value.Equals(short1))

      Dim int1 As Integer = 112
      Console.WriteLine("value = int1: {0,17}", value.Equals(int1))

      Dim sbyte1 As SByte = 112
      Console.WriteLine("value = sbyte1: {0,15}", value.Equals(sbyte1))

      Dim ushort1 As UShort = 112
      Console.WriteLine("value = ushort1: {0,15}", value.Equals(ushort1))

      Dim uint1 As UInteger = 112
      Console.WriteLine("value = uint1: {0,17}", value.Equals(uint1))

      Dim dec1 As Decimal = 112d
      Console.WriteLine("value = dec1: {0,20}", value.Equals(dec1))

      Dim dbl1 As Double = 112
      Console.WriteLine("value = dbl1: {0,19}", value.Equals(dbl1))
   End Sub

   Private Sub TestObjectForEquality(obj As Object)
      Console.WriteLine("{0} ({1}) = {2} ({3}): {4}",
                        value, value.GetType().Name,
                        obj, obj.GetType().Name,
   End Sub
End Module
' 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

Universal Windows Platform
Available since 8
.NET Framework
Available since 2.0
Portable Class Library
Supported in: portable .NET platforms
Available since 2.0
Windows Phone Silverlight
Available since 7.0
Windows Phone
Available since 8.1
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