DesignerCategoryAttribute.cs

Go to the documentation of this file.

using System.Diagnostics.CodeAnalysis;
 
namespace System.ComponentModel;
 
[AttributeUsage(AttributeTargets.Class, AllowMultiple = false, Inherited = true)]
public sealed class DesignerCategoryAttribute : Attribute
{
    public static readonly DesignerCategoryAttribute Component = new DesignerCategoryAttribute("Component");
 
    public static readonly DesignerCategoryAttribute Default = new DesignerCategoryAttribute();
 
    public static readonly DesignerCategoryAttribute Form = new DesignerCategoryAttribute("Form");
 
    public static readonly DesignerCategoryAttribute Generic = new DesignerCategoryAttribute("Designer");
 
    public string Category { get; }
 
    public override object TypeId => GetType().FullName + Category;
 
    public DesignerCategoryAttribute()
        : this(string.Empty)
    {
    }
 
    public DesignerCategoryAttribute(string category)
    {
        Category = category;
    }
 
    public override bool Equals([NotNullWhen(true)] object? obj)
    {
        if (obj is DesignerCategoryAttribute designerCategoryAttribute)
        {
            return designerCategoryAttribute.Category == Category;
        }
        return false;
    }
 
    public override int GetHashCode()
    {
        return Category?.GetHashCode() ?? 0;
    }
 
    public override bool IsDefaultAttribute()
    {
        return Category == Default.Category;
    }
}