using System;
using System.IO;
namespace Example.App.Utils
{
/// <summary>
/// Helper class for file I/O operations
/// </summary>
public static class FileHelper
{
/// <summary>
/// Reads the first line from a file
/// </summary>
public static string ReadFirstLine(string filePath)
{
if (string.IsNullOrEmpty(filePath))
{
throw new ArgumentException("File path cannot be null or empty", nameof(filePath));
}
if (!File.Exists(filePath))
{
throw new FileNotFoundException($"File not found: {filePath}");
}
using (var reader = new StreamReader(filePath))
{
return reader.ReadLine() ?? string.Empty;
}
}
/// <summary>
/// Writes text to a file
/// </summary>
public static void WriteToFile(string filePath, string content)
{
if (string.IsNullOrEmpty(filePath))
{
throw new ArgumentException("File path cannot be null or empty", nameof(filePath));
}
File.WriteAllText(filePath, content);
}
/// <summary>
/// Checks if a file exists
/// </summary>
public static bool FileExists(string filePath)
{
return !string.IsNullOrEmpty(filePath) && File.Exists(filePath);
}
}
}
