base64

1
2const b64string = /* whatever */;
3const buf = Buffer.from(b64string, 'base64');
4

1class Program
2{
3    static void Main(string[] args)
4    {
5        var account = new ExternalAccount() { Name = "Someone" };
6        string json = JsonConvert.SerializeObject(account);
7        string base64EncodedExternalAccount = Convert.ToBase64String(Encoding.UTF8.GetBytes(json));
8        byte[] byteArray = Convert.FromBase64String(base64EncodedExternalAccount);
9
10        string jsonBack = Encoding.UTF8.GetString(byteArray);
11        var accountBack = JsonConvert.DeserializeObject<ExternalAccount>(jsonBack);
12        Console.WriteLine(accountBack.Name);
13        Console.ReadLine();
14    }
15}
16
17[Serializable]
18public class ExternalAccount
19{
20    public string Name { get; set; }
21}

1ulong ulNumber = 163245617943825;
2try {
3   long number1 = (long) ulNumber;
4   Console.WriteLine(number1);
5}
6catch (OverflowException) {
7   Console.WriteLine("{0} is out of range of an Int64.", ulNumber);
8}
9
10double dbl2 = 35901.997;
11try {
12   long number2 = (long) dbl2;
13   Console.WriteLine(number2);
14}   
15catch (OverflowException) {
16   Console.WriteLine("{0} is out of range of an Int64.", dbl2);
17}
18   
19BigInteger bigNumber = (BigInteger) 1.63201978555e30;
20try {
21   long number3 = (long) bigNumber;
22   Console.WriteLine(number3);
23}
24catch (OverflowException) {
25   Console.WriteLine("{0} is out of range of an Int64.", bigNumber);
26}    
27// The example displays the following output:
28//    163245617943825
29//    35902
30//    1,632,019,785,549,999,969,612,091,883,520 is out of range of an Int64.
31

1decimal[] values= { Decimal.MinValue, -1034.23m, -12m, 0m, 147m,
2                    199.55m, 9214.16m, Decimal.MaxValue };
3long result;
4
5foreach (decimal value in values)
6{
7   try {
8      result = Convert.ToInt64(value);
9      Console.WriteLine("Converted the {0} value '{1}' to the {2} value {3}.",
10                        value.GetType().Name, value,
11                        result.GetType().Name, result);
12   }
13   catch (OverflowException) {
14      Console.WriteLine("{0} is outside the range of the Int64 type.",
15                        value);
16   }   
17}                                  
18// The example displays the following output:
19//    -79228162514264337593543950335 is outside the range of the Int64 type.
20//    Converted the Decimal value '-1034.23' to the Int64 value -1034.
21//    Converted the Decimal value '-12' to the Int64 value -12.
22//    Converted the Decimal value '0' to the Int64 value 0.
23//    Converted the Decimal value '147' to the Int64 value 147.
24//    Converted the Decimal value '199.55' to the Int64 value 200.
25//    Converted the Decimal value '9214.16' to the Int64 value 9214.
26//    79228162514264337593543950335 is outside the range of the Int64 type.
27