ReflectionXmlSerializationHelper.cs

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using System.Diagnostics.CodeAnalysis;
using System.Reflection;
 
namespace System.Xml.Serialization;
 
internal static class ReflectionXmlSerializationHelper
{
    [RequiresUnreferencedCode("Reflects over base members")]
    public static MemberInfo GetMember(Type declaringType, string memberName, bool throwOnNotFound)
    {
        MemberInfo[] member = declaringType.GetMember(memberName);
        if (member == null || member.Length == 0)
        {
            bool flag = false;
            Type baseType = declaringType.BaseType;
            while (baseType != null)
            {
                member = baseType.GetMember(memberName);
                if (member != null && member.Length != 0)
                {
                    flag = true;
                    break;
                }
                baseType = baseType.BaseType;
            }
            if (!flag)
            {
                if (throwOnNotFound)
                {
                    throw new InvalidOperationException(System.SR.Format(System.SR.XmlInternalErrorDetails, $"Could not find member named {memberName} of type {declaringType}"));
                }
                return null;
            }
            declaringType = baseType;
        }
        MemberInfo result = member[0];
        if (member.Length != 1)
        {
            MemberInfo[] array = member;
            foreach (MemberInfo memberInfo in array)
            {
                if (declaringType == memberInfo.DeclaringType)
                {
                    result = memberInfo;
                    break;
                }
            }
        }
        return result;
    }
 
    [RequiresUnreferencedCode("Members from serialized types may be trimmed if not referenced directly")]
    public static MemberInfo GetEffectiveGetInfo(Type declaringType, string memberName)
    {
        MemberInfo member = GetMember(declaringType, memberName, throwOnNotFound: true);
        if (member is PropertyInfo propertyInfo && propertyInfo.GetMethod == null)
        {
            Type baseType = declaringType.BaseType;
            while (baseType != null)
            {
                MemberInfo member2 = GetMember(baseType, memberName, throwOnNotFound: false);
                if (member2 is PropertyInfo propertyInfo2 && propertyInfo2.GetMethod != null && propertyInfo2.PropertyType == propertyInfo.PropertyType)
                {
                    return propertyInfo2;
                }
                baseType = baseType.BaseType;
            }
        }
        return member;
    }
 
    [RequiresUnreferencedCode("Members from serialized types may be trimmed if not referenced directly")]
    public static MemberInfo GetEffectiveSetInfo(Type declaringType, string memberName)
    {
        MemberInfo member = GetMember(declaringType, memberName, throwOnNotFound: true);
        if (member is PropertyInfo propertyInfo && propertyInfo.SetMethod == null)
        {
            Type baseType = declaringType.BaseType;
            while (baseType != null)
            {
                MemberInfo member2 = GetMember(baseType, memberName, throwOnNotFound: false);
                if (member2 is PropertyInfo propertyInfo2 && propertyInfo2.SetMethod != null && propertyInfo2.PropertyType == propertyInfo.PropertyType)
                {
                    return propertyInfo2;
                }
                baseType = baseType.BaseType;
            }
        }
        return member;
    }
}