To retrieve input from the console you need to use the Console.ReadLine() function, it returns a string after the user enters the enter key.

Here's a sample program in C# that uses the `yfinance` library to retrieve options data for the stock with a user inputted ticker symbol:

```
using System;
using yfinance;

namespace StockOptions
{
    class Program
    {
        static void Main(string[] args)
        {
            var ticker = Console.ReadLine();
            var stock = Stock.Get(ticker );
            var options = stock.Options;

            Console.WriteLine($"Options for stock with ticker symbol {ticker}:");
            Console.WriteLine("------------------------------------------------");

            foreach (var option in options)
            {
                Console.WriteLine("Option symbol: " + option.Symbol);
                Console.WriteLine("Expiration date: " + option.Expiration);
                Console.WriteLine("Strike price: " + option.Strike);
                Console.WriteLine("Option type: " + option.Type);
                Console.WriteLine("Last price: " + option.LastPrice);
                Console.WriteLine("------------------------------------------------");
            }

            Console.ReadLine();
        }
    }
}

```

The first Console.WriteLine statement is modified to use string comprehension to print out the correct ticker symbol.
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