C# Online Compiler | .NET Fiddle

<no name> by Anonymous

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Text.RegularExpressions;
using System.Threading.Tasks;

namespace ex
{
    class Program
    {

        public static string Changing(string input,string key,(string,string)[]patterns)
        {
            for (int i = 0; i < patterns.Length; i++)
            {
                input = input.Replace(patterns[i].Item1, patterns[i].Item1 + key);
            }
            for (int i = 0; i < patterns.Length; i++)
            {
                input = input.Replace(patterns[i].Item1+key, patterns[i].Item2);
            }
            return input;
        }
        static void Main(string[] args)
        {
            string example = "AAABBCCCCDDEQWJJKAYZ";
            string example2 = "A/A/A/BB/CCCC//DD/"; //=>DD/DD/DD/C/VVV//ABC//
            string key = "myKey";// Value for conditional understanding
                       
            (string, string)[] patterns = new (string, string)[] {("A","DD"),("BB","C"),("DD","ABC"),("CCCC","VVV")};
            Console.WriteLine(Changing(example,key,patterns));
            Console.WriteLine(Changing(example2,key,patterns));
            Console.ReadKey();
        }
    }
}
//replacements:
//A => DD
//BB => C
//DD => ABC
//CCCC => VVV

//output:
//DDDDDDCVVVABCEQWJJKDDYZ

​x
 
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Text.RegularExpressions;
using System.Threading.Tasks;
​
namespace ex
{
    class Program
    {
​
        public static string Changing(string input,string key,(string,string)[]patterns)
        {
            for (int i = 0; i < patterns.Length; i++)
            {
                input = input.Replace(patterns[i].Item1, patterns[i].Item1 + key);
            }
            for (int i = 0; i < patterns.Length; i++)
            {
                input = input.Replace(patterns[i].Item1+key, patterns[i].Item2);
            }
            return input;
        }
        static void Main(string[] args)
        {
            string example = "AAABBCCCCDDEQWJJKAYZ";
            string example2 = "A/A/A/BB/CCCC//DD/"; //=>DD/DD/DD/C/VVV//ABC//
            string key = "myKey";// Value ••for conditional understanding
                       
            (string, string)[] patterns = new (string, string)[] {("A","DD"),("BB","C"),("DD","ABC"),("CCCC","VVV")};
            Console.WriteLine(Changing(example,key,patterns));
            Console.WriteLine(Changing(example2,key,patterns));
            Console.ReadKey();
        }
    }
}
//replacements:
//A => DD
//BB => C
//DD => ABC
//CCCC => VVV
​
//output:
//DDDDDDCVVVABCEQWJJKDDYZ

Compilation error (line 14, col 20): The type or namespace name 'FileStream' could not be found (are you missing a using directive or an assembly reference?)
Compilation error (line 14, col 40): The type or namespace name 'FileStream' could not be found (are you missing a using directive or an assembly reference?)
Compilation error (line 14, col 51): The name 'Path' does not exist in the current context
Compilation error (line 14, col 64): The name 'Path' does not exist in the current context
Compilation error (line 14, col 86): The name 'Assembly' does not exist in the current context
Compilation error (line 14, col 142): The name 'FileMode' does not exist in the current context
Compilation error (line 15, col 20): The type or namespace name 'BinaryReader' could not be found (are you missing a using directive or an assembly reference?)
Compilation error (line 15, col 42): The type or namespace name 'BinaryReader' could not be found (are you missing a using directive or an assembly reference?)
Compilation error (line 21, col 69): The name 'textBox1' does not exist in the current context
Compilation error (line 23, col 13): The name 'richTextBox1' does not exist in the current context
Compilation error (line 28, col 59): The name 'richTextBox1' does not exist in the current context
Compilation error (line 28, col 78): The name 'textBox1' does not exist in the current context
Compilation error (line 31, col 20): The type or namespace name 'FileStream' could not be found (are you missing a using directive or an assembly reference?)
Compilation error (line 31, col 41): The type or namespace name 'FileStream' could not be found (are you missing a using directive or an assembly reference?)
Compilation error (line 31, col 52): The name 'Path' does not exist in the current context
Compilation error (line 31, col 65): The name 'Path' does not exist in the current context
Compilation error (line 31, col 87): The name 'Assembly' does not exist in the current context
Compilation error (line 31, col 147): The name 'FileMode' does not exist in the current context
Compilation error (line 32, col 20): The type or namespace name 'BinaryWriter' could not be found (are you missing a using directive or an assembly reference?)
Compilation error (line 32, col 42): The type or namespace name 'BinaryWriter' could not be found (are you missing a using directive or an assembly reference?)
Compilation error (line 51, col 38): The name 'Encoding' does not exist in the current context
Compilation error (line 52, col 43): The type or namespace name 'Rfc2898DeriveBytes' could not be found (are you missing a using directive or an assembly reference?)
Compilation error (line 55, col 51): The type or namespace name 'RijndaelManaged' could not be found (are you missing a using directive or an assembly reference?)
Compilation error (line 58, col 45): The name 'CipherMode' does not exist in the current context
Compilation error (line 59, col 48): The name 'PaddingMode' does not exist in the current context
Compilation error (line 62, col 59): The type or namespace name 'MemoryStream' could not be found (are you missing a using directive or an assembly reference?)
Compilation error (line 64, col 63): The type or namespace name 'CryptoStream' could not be found (are you missing a using directive or an assembly reference?)
Compilation error (line 64, col 101): The name 'CryptoStreamMode' does not exist in the current context
Compilation error (line 70, col 71): 'System.Array' does not contain a definition for 'Concat' and no extension method 'Concat' accepting a first argument of type 'System.Array' could be found (are you missing a using directive or an assembly reference?)
Compilation error (line 71, col 71): 'System.Array' does not contain a definition for 'Concat' and no extension method 'Concat' accepting a first argument of type 'System.Array' could be found (are you missing a using directive or an assembly reference?)
Compilation error (line 88, col 68): 'System.Array' does not contain a definition for 'Take' and no extension method 'Take' accepting a first argument of type 'System.Array' could be found (are you missing a using directive or an assembly reference?)
Compilation error (line 90, col 66): 'System.Array' does not contain a definition for 'Skip' and no extension method 'Skip' accepting a first argument of type 'System.Array' could be found (are you missing a using directive or an assembly reference?)
Compilation error (line 92, col 68): 'System.Array' does not contain a definition for 'Skip' and no extension method 'Skip' accepting a first argument of type 'System.Array' could be found (are you missing a using directive or an assembly reference?)
Compilation error (line 94, col 43): The type or namespace name 'Rfc2898DeriveBytes' could not be found (are you missing a using directive or an assembly reference?)
Compilation error (line 97, col 51): The type or namespace name 'RijndaelManaged' could not be found (are you missing a using directive or an assembly reference?)
Compilation error (line 100, col 45): The name 'CipherMode' does not exist in the current context
Compilation error (line 101, col 48): The name 'PaddingMode' does not exist in the current context
Compilation error (line 104, col 59): The type or namespace name 'MemoryStream' could not be found (are you missing a using directive or an assembly reference?)
Compilation error (line 106, col 63): The type or namespace name 'CryptoStream' could not be found (are you missing a using directive or an assembly reference?)
Compilation error (line 106, col 101): The name 'CryptoStreamMode' does not exist in the current context
Compilation error (line 112, col 44): The name 'Encoding' does not exist in the current context
Compilation error (line 123, col 41): The type or namespace name 'RNGCryptoServiceProvider' could not be found (are you missing a using directive or an assembly reference?)

Last Run:	1:57:22 pm
Compile:	0s
Execute:	0.332s
Memory:	0b
CPU:	0s

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