System.Text.Json检查数组是否为空

using System;
using System.Text.Json;

public class Program
{
    public static void Main()
    {
        string json = "[1, 2, 3]";
        JsonDocument document = JsonDocument.Parse(json);
        
        JsonElement root = document.RootElement;
        if (root.ValueKind == JsonValueKind.Array)
        {
            int arrayLength = root.GetArrayLength();
            if (arrayLength == 0)
            {
                Console.WriteLine("The array is empty.");
            }
            else
            {
                Console.WriteLine("The array is not empty. Length: " + arrayLength);
            }
        }
        else
        {
            Console.WriteLine("The input is not a valid JSON array.");
        }
    }
}