XTypeDescriptor.cs

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using System;
using System.ComponentModel;
using System.Diagnostics.CodeAnalysis;
using System.Xml.Linq;
 
namespace MS.Internal.Xml.Linq.ComponentModel;
 
internal sealed class XTypeDescriptor<T> : CustomTypeDescriptor
{
    public XTypeDescriptor(ICustomTypeDescriptor parent)
        : base(parent)
    {
    }
 
    [RequiresUnreferencedCode("PropertyDescriptor's PropertyType cannot be statically discovered.")]
    public override PropertyDescriptorCollection GetProperties()
    {
        return GetProperties(null);
    }
 
    [RequiresUnreferencedCode("PropertyDescriptor's PropertyType cannot be statically discovered. The public parameterless constructor or the 'Default' static field may be trimmed from the Attribute's Type.")]
    public override PropertyDescriptorCollection GetProperties(Attribute[] attributes)
    {
        PropertyDescriptorCollection propertyDescriptorCollection = new PropertyDescriptorCollection(null);
        if (attributes == null)
        {
            if (typeof(T) == typeof(XElement))
            {
                propertyDescriptorCollection.Add(new XElementAttributePropertyDescriptor());
                propertyDescriptorCollection.Add(new XElementDescendantsPropertyDescriptor());
                propertyDescriptorCollection.Add(new XElementElementPropertyDescriptor());
                propertyDescriptorCollection.Add(new XElementElementsPropertyDescriptor());
                propertyDescriptorCollection.Add(new XElementValuePropertyDescriptor());
                propertyDescriptorCollection.Add(new XElementXmlPropertyDescriptor());
            }
            else if (typeof(T) == typeof(XAttribute))
            {
                propertyDescriptorCollection.Add(new XAttributeValuePropertyDescriptor());
            }
        }
        foreach (PropertyDescriptor property in base.GetProperties(attributes))
        {
            propertyDescriptorCollection.Add(property);
        }
        return propertyDescriptorCollection;
    }
}