Remotely/Shared/Extensions/StringExtensions.cs

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Remotely.Shared.Extensions
{
    public static class StringExtensions
    {
        public static string SanitizeFileName(this string fileName)
        {
            if (string.IsNullOrWhiteSpace(fileName))
            {
                return string.Empty;
            }

            var invalidChars = Path.GetInvalidFileNameChars();
            var validChars = fileName
                .Where(x => !invalidChars.Contains(x))
                .ToArray();

            return new string(validChars);
        }

        public static string SanitizeFileSystemPath(this string path)
        {
            if (string.IsNullOrWhiteSpace(path))
            {
                return string.Empty;
            }

            var invalidChars = Path.GetInvalidPathChars();
            var validChars = path
                .Where(x => !invalidChars.Contains(x))
                .ToArray();

            return new string(validChars);
        }
    }
}