DesignerSerializerAttribute.cs

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namespace System.ComponentModel.Design.Serialization;
 
[AttributeUsage(AttributeTargets.Class | AttributeTargets.Interface, AllowMultiple = true, Inherited = true)]
public sealed class DesignerSerializerAttribute : Attribute
{
    private string _typeId;
 
    public string? SerializerTypeName { get; }
 
    public string? SerializerBaseTypeName { get; }
 
    public override object TypeId
    {
        get
        {
            if (_typeId == null)
            {
                string text = SerializerBaseTypeName ?? string.Empty;
                int num = text.IndexOf(',');
                if (num != -1)
                {
                    text = text.Substring(0, num);
                }
                _typeId = GetType().FullName + text;
            }
            return _typeId;
        }
    }
 
    public DesignerSerializerAttribute(Type serializerType, Type baseSerializerType)
    {
        if (serializerType == null)
        {
            throw new ArgumentNullException("serializerType");
        }
        if (baseSerializerType == null)
        {
            throw new ArgumentNullException("baseSerializerType");
        }
        SerializerTypeName = serializerType.AssemblyQualifiedName;
        SerializerBaseTypeName = baseSerializerType.AssemblyQualifiedName;
    }
 
    public DesignerSerializerAttribute(string? serializerTypeName, Type baseSerializerType)
    {
        if (baseSerializerType == null)
        {
            throw new ArgumentNullException("baseSerializerType");
        }
        SerializerTypeName = serializerTypeName;
        SerializerBaseTypeName = baseSerializerType.AssemblyQualifiedName;
    }
 
    public DesignerSerializerAttribute(string? serializerTypeName, string? baseSerializerTypeName)
    {
        SerializerTypeName = serializerTypeName;
        SerializerBaseTypeName = baseSerializerTypeName;
    }
}