C#

public DateTime? Activation_Date { get; set; }
public DateTime? Deactivation_Date { get; set; }

The value 'abc' is not valid for Activation_Date.

The value 'abc' is not valid for Activation Date.

@Html.ValidationMessageFor(s => s.Activation_Date)

public static void Main(string[] args)
        {

            var dir = @"C:\temp\TestDir";
            PrintDirectoryTree(dir, 2, new string[] { "folder3" });
        }


        public static void PrintDirectoryTree(string directory, int lvl, string[] excludedFolders = null, string lvlSeperator = "")
        {
            excludedFolders = excludedFolders ?? new string[0];

            foreach (string f in Directory.GetFiles(directory))
            {
               
                  Console.WriteLine(lvlSeperator + Path.GetFileName(f));
               
            }

            foreach (string d in Directory.GetDirectories(directory))
            {
                Console.WriteLine(lvlSeperator + "-" + Path.GetFileName(d));

                if (lvl > 0 && Array.IndexOf(excludedFolders, Path.GetFileName(d)) < 0)
                {
                    PrintDirectoryTree(d, lvl - 1, excludedFolders, lvlSeperator + "  ");
                }
            }
        }

var allDrives = DriveInfo.GetDrives();

public static List GetUSBDevices()
{
    var file = @"c:\projects\usbinfo.csv";
    if (File.Exists(file))
    {
        File.Delete(file);
    }

    var devices = new List();

    ManagementObjectCollection collection;
    using (var searcher = new ManagementObjectSearcher("Select * From Win32_PnPEntity"))
    {
        collection = searcher.Get();
    }

    using (var sw = new StreamWriter(file, true))
    {
        var line = "";

        var keys = new string[]
        {
            "Name",
            "Description",
            "Caption",
            "ClassGuid",
        };

        // Write out header line
        foreach (var key in keys)
        {
            line += $"{key},";
        }
        sw.WriteLine(line);
        line = "";

        foreach (var device in collection)
        {
            var name = (string)device.GetPropertyValue("Name");
            var classGuid = (string)device.GetPropertyValue("ClassGuid");

            if (classGuid == "{eec5ad98-8080-425f-922a-dabf3de3f69a}")
            {
                foreach (var key in keys)
                {
                    try
                    {
                        line += $"{(string)device.GetPropertyValue(key)},";
                    }
                    catch { }
                }
                sw.WriteLine(line);
                line = "";
            }
        }
    }

    collection.Dispose();
    return devices;
}

Name,Description,Caption,ClassGuid
One Touch,One Touch HDD   ,One Touch,{eec5ad98-8080-425f-922a-dabf3de3f69a}
E:\,STORAGE DEVICE  ,E:\,{eec5ad98-8080-425f-922a-dabf3de3f69a}
Galaxy S22 Ultra,SM-S908U,Galaxy S22 Ultra,{eec5ad98-8080-425f-922a-dabf3de3f69a}
Lenovo Tab M10,Lenovo TB-X505F,Lenovo Tab M10,{eec5ad98-8080-425f-922a-dabf3de3f69a}

Value_Extract = ((Convert.ToDecimal(rtbIncoming.Text));