Search Contents of a Text File

static void Main(string[] args)
{
    Console.WriteLine("Enter the file path: ");
    var filePath = Console.ReadLine();
    Console.WriteLine("Enter text to search: ");
    var searchTerm = Console.ReadLine();
    var fsLib = new FSLibrary();
    Console.WriteLine("No. of matches: {0}", fsLib.SearchOccurances(filePath, searchTerm));
    Console.ReadKey();
}
public int SearchOccurances(string filePath, string searchTerm)
{
    int occurances = 0;
    var fileContents = File.ReadAllText(filePath);
    if (!String.IsNullOrEmpty(fileContents))
    {
        MatchCollection matches = Regex.Matches(fileContents, searchTerm, RegexOptions.IgnoreCase);
        if (matches != null)
        {
            occurances = matches.Count;
        }
    }
    return (occurances);
}