using System;

public class Program

{

    public static void Main()

    {

        char[] charsToTrim1 = { '{', '}' }; // open close curly braces

        string quoteNumStr = "{\"QuoteNum\":364}";

        Console.WriteLine($"quoteNumStr: {quoteNumStr}");

        quoteNumStr = quoteNumStr.Trim(charsToTrim1);

        Console.WriteLine($"quoteNumStr: {quoteNumStr}");

        string[] quoteNumStrArr = quoteNumStr.Split(':');

        int quoteNum = Convert.ToInt32(quoteNumStrArr[1]);

        Console.WriteLine($"quoteNum: {quoteNum}");

    }

}