Can not run the code

[songyanglihua]

I download the code. Open src with VS2019. When I Run Code. private static string GetValue(string key, string cfg) { // Find start of 'Key' int i = cfg.IndexOf(key); if (i >= 0) { i = cfg.IndexOf('=', i); int z = cfg.IndexOf(Environment.NewLine, i + 1);

            // Get only 'Value' text
            return cfg.Substring(i + 1, z - i).Trim();
        }

        return null;
    }

It's wrong.why?I want to run code on my computer.what should i do?

[intolerance]

Need more clarification here on what the actual problem is.