如何通过在父类上实现IDataErrorInfo来验证子对象

public class Parent : IDataErrorInfo
{
    public string Error
    {
        get
        {
            // 返回总体错误信息
        }
    }

    public string this[string columnName]
    {
        get
        {
            // 返回特定属性的错误信息
        }
    }
}

public class Parent : IDataErrorInfo
{
    public string Error
    {
        get
        {
            // 返回总体错误信息
            var errors = new List<string>();
            foreach (var property in GetType().GetProperties())
            {
                var error = this[property.Name];
                if (!string.IsNullOrEmpty(error))
                {
                    errors.Add(error);
                }
            }
            return string.Join("; ", errors);
        }
    }

    public string this[string columnName]
    {
        get
        {
            // 返回特定属性的错误信息
            var property = GetType().GetProperty(columnName);
            if (property == null)
            {
                return null;
            }
            var value = property.GetValue(this);
            if (value == null)
            {
                return "Value cannot be null";
            }
            // 对属性进行验证，并返回相应的错误信息
            return null;
        }
    }
}

public class Child : Parent
{
    public string Name { get; set; }
    public int Age { get; set; }

    public override string this[string columnName]
    {
        get
        {
            // 添加自己的属性验证逻辑
            switch (columnName)
            {
                case "Name":
                    if (string.IsNullOrEmpty(Name))
                    {
                        return "Name cannot be empty";
                    }
                    break;
                case "Age":
                    if (Age < 0 || Age > 150)
                    {
                        return "Age must be between 0 and 150";
                    }
                    break;
            }
            return base[columnName];
        }
    }
}