ขอตัวอย่างโค้ด C# Random สุ่มตัวเลขรวมกับตัวอักษรภาษาอังกฤษ 10 หลัก หน่อยครับ

var chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
var random = new Random();
var result = new string(
    Enumerable.Repeat(chars, 10)
              .Select(s => s[random.Next(s.Length)])
              .ToArray());

private string RandomString(int Size)
{
    string input = "abcdefghijklmnopqrstuvwxyz0123456789";
    StringBuilder builder = new StringBuilder();
    char ch;
    for (int i = 0; i < Size; i++)
    {
        ch = input[random.Next(0, input.Length)];
        builder.Append(ch);
    }
    return builder.ToString();
}

private static string RandomString(int Size)
{
    string input = "abcdefghijklmnopqrstuvwxyz0123456789";
    var chars  = Enumerable.Range(0, Size)
                           .Select(x => input[random.Next(0, input.Length)]);
    return new string(chars.ToArray());
}

    Public Shared Function RandomAlphaNumber(Optional ByVal Qty As Integer = 10, Optional ByVal chars As String = "abcdefghijklmnopqrstuvwxyz0123456789") As String
        If (Qty = Nothing OrElse chars = Nothing OrElse chars.Length = 0 OrElse Qty < 1) Then
            'write log.
            Return "Error Random String"
        End If
        Dim rnd = New Random()
        Return New String(Enumerable.Repeat(chars, Qty).Select(Function(s) s(rnd.Next(s.Length))).ToArray())
    End Function