using System;

using System.Text.RegularExpressions;

​

public class Program

{

    public static void Main()

    {

            string content = @"![Image Description](/image-path.png)";

            var matches = new Regex(@"!\[(.*?)\]\((.*?)\)").Matches(content);

            Console.WriteLine(matches[0].Groups[1]);

            Console.WriteLine(matches[0].Groups[2]);

    }

}