Searching for a Specific Word in a Text File and Displaying the line its on

Question

I am having trouble attempting to find words in a text file in C#.

I want to find the word that is input into the console then display the entire line that the word

Answer 1

Iterate through all the lines (StreamReader, File.ReadAllLines, etc.) and check if line.Contains("December") (replace "December" with the user input).

Edit: I would go with the StreamReader in case you have large files. And use the IndexOf-Example from @Matias Cicero instead of contains for case insensitive.

Console.Write("Keyword: ");
var keyword = Console.ReadLine() ?? "";
using (var sr = new StreamReader("")) {
    while (!sr.EndOfStream) {
        var line = sr.ReadLine();
        if (String.IsNullOrEmpty(line)) continue;
        if (line.IndexOf(keyword, StringComparison.CurrentCultureIgnoreCase) >= 0) {
            Console.WriteLine(line);
        }
    }
}