using System;
using System.IO;
using System.Security.Cryptography;
using System.Text;
using System.Reflection;

namespace Aes_Example
{
    class AesExample
    {
        public static void Main()
        {
            // string original = "Here is some data to encrypt!";
            using (AesManaged myAes = new AesManaged())
            {
                /*string encrypted = */EncryptStringToBytes_Aes( "", "5eybQn5o/siTdctkclHITDLMkPiIby74lhlGjTXZAr4=", "JDnqkeE4RnlcpylPSzLbhw==");
                // Console.WriteLine(encrypted);
            }
        }
       static  void EncryptStringToBytes_Aes(string plainText, string Key, string IV)
        {
            // byte[] encrypted;
            using (AesManaged aes = new AesManaged())
            {               
                byte[] key = Convert.FromBase64String(Key); 
                byte[] iv = Convert.FromBase64String(IV); 
                string Password = "SfeBVZ3MyNaubuVY@";
                string Username = "PrudentinsureApp_test";
                ICryptoTransform decryptor = aes.CreateEncryptor(key, iv);
                var tickCount = DateTime.UtcNow.Ticks;  
                
                Console.WriteLine(tickCount);
                byte[] cipherText = Encoding.ASCII.GetBytes(Password + tickCount);
                // string plaintext = "";
                using (MemoryStream opStream = new MemoryStream())
                {
					//string plainText = "";
                    using (MemoryStream ms = new MemoryStream(cipherText))
                    {
                        using (CryptoStream cs = new CryptoStream(ms, decryptor, CryptoStreamMode.Read))
                        {
                            cs.CopyTo(opStream);
                        }
                    }
                    plainText = Convert.ToBase64String(opStream.ToArray());
                }      
               /*string FinalValue =*/ 
               Console.WriteLine(Convert.ToBase64String(Encoding.ASCII.GetBytes(Username + ":" + plainText + ":" + tickCount)));
			/*	return FinalValue;*/
	     }
			
        }
    }
}

C Sharp Online Compiler

Write, Run & Share C# code online using OneCompiler's C# online compiler for free. It's one of the robust, feature-rich online compilers for C# language, running on the latest version 8.0. Getting started with the OneCompiler's C# compiler is simple and pretty fast. The editor shows sample boilerplate code when you choose language as C# and start coding.

Read inputs from stdin

OneCompiler's C# online compiler supports stdin and users can give inputs to programs using the STDIN textbox under the I/O tab. Following is a sample program which takes name as input and print your name with hello.

using System;
 
namespace Sample
{
  class Test
    {
      public static void Main(string[] args)
       {
         string name;
         name = Console.ReadLine();
         Console.WriteLine("Hello {0} ", name);
	}
     }
}

About C Sharp

C# is a general purpose object-oriented programming language by Microsoft. Though initially it was developed as part of .net but later it was approved by ECMA and ISO standards.

You can use C# to create variety of applications, like web, windows, mobile, console applications and much more using Visual studio.

Syntax help

Data types

Data TypeDescriptionRangesize
intTo store integers-2,147,483,648 to 2,147,483,6474 bytes
doubleto store large floating point numbers with decimalscan store 15 decimal digits8 bytes
floatto store floating point numbers with decimalscan store upto 7 decimal digits4 bytes
charto store single characters-2 bytes
stringto stores text-2 bytes per character
boolto stores either true or false-1 bit

Variables

Syntax

datatype variable-name = value;

Loops

1. If-Else:

When ever you want to perform a set of operations based on a condition or set of few conditions IF-ELSE is used.

if(conditional-expression) {
   // code
} 
else {
   // code
}

You can also use if-else for nested Ifs and If-Else-If ladder when multiple conditions are to be performed on a single variable.

2. Switch:

Switch is an alternative to If-Else-If ladder.

switch(conditional-expression) {    
case value1:    
 // code    
 break;  // optional  
case value2:    
 // code    
 break;  // optional  
...    
    
default:     
 // code to be executed when all the above cases are not matched;    
}

3. For:

For loop is used to iterate a set of statements based on a condition.

for(Initialization; Condition; Increment/decrement) {
  // code  
}

4. While:

While is also used to iterate a set of statements based on a condition. Usually while is preferred when number of iterations are not known in advance.

while(condition) {
 // code 
}

5. Do-While:

Do-while is also used to iterate a set of statements based on a condition. It is mostly used when you need to execute the statements atleast once.

do {
  // code 
} while (condition);

Arrays

Array is a collection of similar data which is stored in continuous memory addresses. Array values can be fetched using index. Index starts from 0 to size-1.

Syntax

data-type[] array-name;

Methods

Method is a set of statements which gets executed only when they are called. Call the method name in the main function to execute the method.

Syntax

static void method-name() 
{
  // code to be executed
}