public void Count()
{
    for (int i = 1; i < 200; i++)
    {
        int local = i * i;
        Dispatcher.Invoke(()=>label9.Content = local);
        Thread.Sleep(400);
    }
}

private static readonly Encoding Windows1251Encoding = Encoding.GetEncoding(1251);
static string FromCyrillicStringArray(string[] values)
{
    var bytes = new byte[values.Length];
    for (var i = 0; i < values.Length; i++)
        bytes[i] = Convert.ToByte(values[i]);
    return Windows1251Encoding.GetString(bytes);
}
...
var codes = new[] { "207", "192", "207", "192" };
Console.WriteLine(FromCyrillicStringArray(codes) == "ПАПА"); // true

var classes = new[]
{
    new
    {
        Name = "System.String",
        AssemblyName = "mscorlib",
        Args = new object[] { "Single argument".ToCharArray() }
    },
    new
    {
        Name = "Newtonsoft.Json.Linq.JObject",
        AssemblyName = "Newtonsoft.Json",
        Args = new object[] {}
    },
    new
    {
        Name = "System.IO.FileInfo",
        AssemblyName = "mscorlib",
        Args = new object[] { @"C:\Windows\System32\cmd.exe" }
    }
};
            
var instances = classes
    .Select(i =>
    {
        var assembly = Assembly.Load(i.AssemblyName);
        var type = assembly.GetType(i.Name);
        var instance = Activator.CreateInstance(type, i.Args);

        return instance;
    })
    .ToArray();