ExtendedProtectionPolicyTypeConverter.cs

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using System.Collections;
using System.ComponentModel;
using System.ComponentModel.Design.Serialization;
using System.Globalization;
using System.Reflection;
using System.Runtime.Versioning;
 
namespace System.Security.Authentication.ExtendedProtection;
 
public class ExtendedProtectionPolicyTypeConverter : TypeConverter
{
    public override bool CanConvertTo(ITypeDescriptorContext? context, Type? destinationType)
    {
        if (!(destinationType == typeof(InstanceDescriptor)))
        {
            return base.CanConvertTo(context, destinationType);
        }
        return true;
    }
 
    [UnsupportedOSPlatform("browser")]
    public override object? ConvertTo(ITypeDescriptorContext? context, CultureInfo? culture, object? value, Type destinationType)
    {
        if (destinationType == typeof(InstanceDescriptor) && value is ExtendedProtectionPolicy extendedProtectionPolicy)
        {
            Type[] types;
            object[] arguments;
            if (extendedProtectionPolicy.PolicyEnforcement == PolicyEnforcement.Never)
            {
                types = new Type[1] { typeof(PolicyEnforcement) };
                arguments = new object[1] { PolicyEnforcement.Never };
            }
            else
            {
                types = new Type[3]
                {
                    typeof(PolicyEnforcement),
                    typeof(ProtectionScenario),
                    typeof(ICollection)
                };
                object[] array = null;
                ServiceNameCollection? customServiceNames = extendedProtectionPolicy.CustomServiceNames;
                if (customServiceNames != null && customServiceNames.Count > 0)
                {
                    array = new object[extendedProtectionPolicy.CustomServiceNames.Count];
                    ((ICollection)extendedProtectionPolicy.CustomServiceNames).CopyTo((Array)array, 0);
                }
                arguments = new object[3] { extendedProtectionPolicy.PolicyEnforcement, extendedProtectionPolicy.ProtectionScenario, array };
            }
            ConstructorInfo constructor = typeof(ExtendedProtectionPolicy).GetConstructor(types);
            return new InstanceDescriptor(constructor, arguments);
        }
        return base.ConvertTo(context, culture, value, destinationType);
    }
}