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Type.Equals Method (Object)

 

Determines if the underlying system type of the current Type object is the same as the underlying system type of the specified Object.

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

public override bool Equals(
	object o
)

Parameters

o
Type: System.Object

The object whose underlying system type is to be compared with the underlying system type of the current Type. For the comparison to succeed, o must be able to be cast or converted to an object of type Type.

Return Value

Type: System.Boolean

true if the underlying system type of o is the same as the underlying system type of the current Type; otherwise, false. This method also returns false if: .

  • o is null.

  • o cannot be cast or converted to a Type object.

This method overrides Object.Equals. It casts o to an object of type Type and calls the Type.Equals(Type) method.

The following example uses Equals(Object) to compare various Type object instances with various Object instances.

using System;
using System.Collections.Generic;
using System.Reflection;

public class Example
{
   public static void Main()
   {
      Type t =typeof(int);
      Object obj1 = typeof(int).GetTypeInfo();
      IsEqualTo(t, obj1);

      Object obj2 = typeof(String);
      IsEqualTo(t, obj2);

      t = typeof(Object);
      Object obj3 = typeof(Object);
      IsEqualTo(t, obj3);

      t = typeof(List<>);
      Object obj4 = (new List<String>()).GetType();
      IsEqualTo(t, obj4);

      t = typeof(Type);
      Object obj5 = null;
      IsEqualTo(t, obj5);
   }

   private static void IsEqualTo(Type t, Object inst)
   {
      Type t2 = inst as Type;
      if (t2 != null)
         Console.WriteLine("{0} = {1}: {2}", t.Name, t2.Name,
                           t.Equals(t2));
      else
         Console.WriteLine("Cannot cast the argument to a type.");

      Console.WriteLine();                        
   }
}
// The example displays the following output:
//       Int32 = Int32: True
//       
//       Int32 = String: False
//       
//       Object = Object: True
//       
//       List`1 = List`1: False
//       
//       Cannot cast the argument to a type.

Two things are particularly worth noting about the example:

  • The comparison of a Type object that represents an integer with a TypeInfo object that represents an integer return true because TypeInfo is derived from Type.

  • The comparison of a Type object that represents a IList<T> object (an open generic type) with a List(Of String) object (a closed generic type) returns false.

Universal Windows Platform
Available since 4.5
.NET Framework
Available since 1.1
Portable Class Library
Supported in: portable .NET platforms
Silverlight
Available since 2.0
Windows Phone Silverlight
Available since 7.0
Windows Phone
Available since 8.1
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