using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text.RegularExpressions;
public class Test
{
public static void Main()
{
string text = "[\"a1\",\"a2\"]";
Regex rg2 = new Regex(@"\A\[""[a-zA-Z0-9]+""(?:,\s*""[a-zA-Z0-9]+"")*]\z");
Console.WriteLine(rg2.IsMatch(text));
}
}
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