InstallerTypeAttribute.cs

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using System.Diagnostics.CodeAnalysis;
 
namespace System.ComponentModel;
 
[AttributeUsage(AttributeTargets.Class)]
public class InstallerTypeAttribute : Attribute
{
    [DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicConstructors)]
    private readonly string _typeName;
 
    [DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicConstructors)]
    public virtual Type? InstallerType => Type.GetType(_typeName);
 
    public InstallerTypeAttribute([DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicConstructors)] Type installerType)
    {
        if (installerType == null)
        {
            throw new ArgumentNullException("installerType");
        }
        _typeName = installerType.AssemblyQualifiedName;
    }
 
    public InstallerTypeAttribute([DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicConstructors)] string? typeName)
    {
        _typeName = typeName;
    }
 
    public override bool Equals([NotNullWhen(true)] object? obj)
    {
        if (obj == this)
        {
            return true;
        }
        if (obj is InstallerTypeAttribute installerTypeAttribute)
        {
            return installerTypeAttribute._typeName == _typeName;
        }
        return false;
    }
 
    public override int GetHashCode()
    {
        return base.GetHashCode();
    }
}