MinLengthAttribute也适用于字典吗？

[AttributeUsage(AttributeTargets.Property)]
public class DictionaryLengthAttribute : ValidationAttribute
{
    private readonly int _minLength;

    public DictionaryLengthAttribute(int minLength)
    {
        _minLength = minLength;
    }

    public override bool IsValid(object value)
    {
        if (value is IDictionary dictionary)
        {
            return dictionary.Count >= _minLength;
        }

        return false;
    }
}

public class MyModel
{
    [DictionaryLength(3)]
    public IDictionary<string, string> MyDictionary { get; set; }
}