Export (0) Print
Expand All

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

using System;

public class Example
{
   static uint value = 112;

   public static void Main()
   {
      byte byte1= 112;
      Console.WriteLine("value = byte1: {0,16}", value.Equals(byte1));
      TestObjectForEquality(byte1);

      short short1 = 112;
      Console.WriteLine("value = short1: {0,17}", value.Equals(short1));
      TestObjectForEquality(short1);

      long long1 = 112;
      Console.WriteLine("value = long1: {0,18}", value.Equals(long1));
      TestObjectForEquality(long1);

      sbyte sbyte1 = 112;
      Console.WriteLine("value = sbyte1: {0,17}", value.Equals(sbyte1));
      TestObjectForEquality(sbyte1);

      ushort ushort1 = 112;
      Console.WriteLine("value = ushort1: {0,16}", value.Equals(ushort1));
      TestObjectForEquality(ushort1);

      ulong ulong1 = 112;
      Console.WriteLine("value = ulong1: {0,18}", value.Equals(ulong1));
      TestObjectForEquality(ulong1);

      decimal dec1 = 112m;
      Console.WriteLine("value = dec1: {0,21}", value.Equals(dec1));
      TestObjectForEquality(dec1);

      double dbl1 = 112;
      Console.WriteLine("value = dbl1: {0,20}", 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 (UInt32) = 112 (Byte): False 
// 
//       value = short1:             False 
//       112 (UInt32) = 112 (Int16): False 
// 
//       value = long1:              False 
//       112 (UInt32) = 112 (Int64): False 
// 
//       value = sbyte1:             False 
//       112 (UInt32) = 112 (SByte): False 
// 
//       value = ushort1:             True 
//       112 (UInt32) = 112 (UInt16): False 
// 
//       value = ulong1:               False 
//       112 (UInt32) = 112 (UInt64): False 
// 
//       value = dec1:                 False 
//       112 (UInt32) = 112 (Decimal): False 
// 
//       value = dbl1:                False 
//       112 (UInt32) = 112 (Double): False

The following code example demonstrates the Equals method.

UInt32 myVariable1 = 20;
UInt32 myVariable2 = 20;

// 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

Portable Class Library

Supported in: Portable Class Library

Supported in: Windows Phone 8.1

Supported in: Windows Phone Silverlight 8.1

Supported in: Windows Phone Silverlight 8
Show:
© 2015 Microsoft