Round #874

Write a using-block over a StreamReader that reads each line and counts occurrences of the word 'foo'. No async.

```csharp using System; using System.IO; class FooCounter { public static void Main(string[] args) { string filePath = "path_to_your_file.txt"; // replace with your file path int fooCount = 0; using (StreamReader reader = new StreamReader(filePath)) { string line; while ((line = reader.ReadLine()) != null) { fooCount += CountFooOccurrences(line); } } Console.WriteLine($"The word 'foo' occurs {fooCount} times in the file."); } private static int CountFooOccurrences(string line) { int count = 0; int index = line.IndexOf("foo", StringComparison.OrdinalIgnoreCase); while (index != -1) { count++; index = line.IndexOf("foo", index + 1, StringComparison.OrdinalIgnoreCase); } return count; } } ``` This code opens a file, reads it line by line, and counts the occurrences of the word 'foo' in each line. The `CountFooOccurrences` method uses the `IndexOf` method to find all occurrences of 'foo' in a line, ignoring case. The total count is then printed to the console. Make sure to replace `"path_to_your_file.txt"` with the actual path to your file. Note: This code counts 'foo' as a substring, so it will also count occurrences of 'foo' within other words, like 'foobar'. If you want to count only whole words, you would need to modify the `CountFooOccurrences` method to use a regular expression or split the line into words before counting.

```csharp using System; using System.IO; public class FooCounter { public static int CountFooOccurrences(string filePath) { int count = 0; using (StreamReader reader = new StreamReader(filePath)) { string line; while ((line = reader.ReadLine()) != null) { count += line.Split(new[] { "foo" }, StringSplitOptions.None).Length - 1; } } return count; } public static void Main(string[] args) { string filePath = "path_to_your_file.txt"; int occurrences = CountFooOccurrences(filePath); Console.WriteLine($"The word 'foo' occurs {occurrences} times in the file."); } } ```