PropertyKey.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / wpf / src / Base / MS / Internal / ComponentModel / PropertyKey.cs / 1305600 / PropertyKey.cs
                        

                        
                             
namespace MS.Internal.ComponentModel
{
    using System;
    using System.Collections.Generic; 
    using System.Windows;
 
    // This structure is used as a key in a dictionary of property key -> property descriptor 
    // The key is unique based on the type the property is attached to, and the property
    // itself. 
    internal struct PropertyKey : IEquatable
    {
        internal PropertyKey(Type attachedType, DependencyProperty prop)
        { 
            DependencyProperty = prop;
            AttachedType = attachedType; 
            _hashCode = AttachedType.GetHashCode() ^ DependencyProperty.GetHashCode(); 
        }
 
        public override int GetHashCode()
        {
            return _hashCode;
        } 

        public override bool Equals(object obj) 
        { 
            return Equals((PropertyKey)obj);
        } 

        public bool Equals(PropertyKey key)
        {
            return (key.AttachedType == AttachedType && key.DependencyProperty == DependencyProperty); 
        }
 
        public static bool operator ==(PropertyKey key1, PropertyKey key2) 
        {
            return (key1.AttachedType == key2.AttachedType && key1.DependencyProperty == key2.DependencyProperty); 
        }

        public static bool operator !=(PropertyKey key1, PropertyKey key2)
        { 
            return (key1.AttachedType != key2.AttachedType || key1.DependencyProperty != key2.DependencyProperty);
        } 
 
        internal DependencyProperty DependencyProperty;
        internal Type AttachedType; 
        private int _hashCode;
    }
}
 

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.

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