EditorAttribute.cs

using System.Globalization;

namespace System.ComponentModel
{
    [AttributeUsage(AttributeTargets.All, AllowMultiple = true, Inherited = true)]
    public sealed class EditorAttribute : Attribute
    {
        private string baseTypeName;

        private string typeName;

        private string typeId;

        public string EditorBaseTypeName => baseTypeName;

        public string EditorTypeName => typeName;

        public override object TypeId
        {
            get
            {
                if (typeId == null)
                {
                    string text = baseTypeName;
                    int num = text.IndexOf(',');
                    if (num != -1)
                    {
                        text = text.Substring(0, num);
                    }
                    typeId = GetType().FullName + text;
                }
                return typeId;
            }
        }

        public EditorAttribute()
        {
            typeName = string.Empty;
            baseTypeName = string.Empty;
        }

        public EditorAttribute(string typeName, string baseTypeName)
        {
            string text = typeName.ToUpper(CultureInfo.InvariantCulture);
            this.typeName = typeName;
            this.baseTypeName = baseTypeName;
        }

        public EditorAttribute(string typeName, Type baseType)
        {
            string text = typeName.ToUpper(CultureInfo.InvariantCulture);
            this.typeName = typeName;
            baseTypeName = baseType.AssemblyQualifiedName;
        }

        public EditorAttribute(Type type, Type baseType)
        {
            typeName = type.AssemblyQualifiedName;
            baseTypeName = baseType.AssemblyQualifiedName;
        }

        public override bool Equals(object obj)
        {
            if (obj == this)
            {
                return true;
            }
            EditorAttribute editorAttribute = obj as EditorAttribute;
            if (editorAttribute != null && editorAttribute.typeName == typeName)
            {
                return editorAttribute.baseTypeName == baseTypeName;
            }
            return false;
        }

        public override int GetHashCode()
        {
            return base.GetHashCode();
        }
    }
}