using System;

using System.Text.RegularExpressions;

using System.Linq;

using System.Collections.Generic;

public class Program

{

    public static void Main()

    {

        var input = "{abc}@{defgh}mner{123}";

        var pattern = @"\{(.+?)\}";

        var matches = Regex.Matches(input, pattern);

        IList<string> output = new List<string>();

        foreach (Match match in matches)

            output.Add(match.Groups[0].Value);

        output.Dump();  

    }

}