diff --git a/core/encoding/cyrillic-to-latin/cs/Common/Common.cs b/core/encoding/cyrillic-to-latin/cs/Common/Common.cs
new file mode 100644
index 00000000000..511ca3c3107
--- /dev/null
+++ b/core/encoding/cyrillic-to-latin/cs/Common/Common.cs
@@ -0,0 +1,15 @@
+using System;
+namespace CyrillicToLatin.Common
+{
+    public static class Common
+    {
+        public const string NoSourceOrDestinationFile = "There must be a source and a destination file.";
+
+        public const string FileDoesntExist = "The source file does not exist.";
+
+        public const string WrongDirectory = "Invalid directory: {0}";
+
+        public const string WrongIO = "I/O exception: {0}";
+    }
+}
+
diff --git a/core/encoding/cyrillic-to-latin/cs/ConsoleModule.cs b/core/encoding/cyrillic-to-latin/cs/ConsoleModule.cs
index 66864c65c49..a1b2cd71bf4 100644
--- a/core/encoding/cyrillic-to-latin/cs/ConsoleModule.cs
+++ b/core/encoding/cyrillic-to-latin/cs/ConsoleModule.cs
@@ -1,6 +1,9 @@
 using System;
 using System.IO;
+using System.Security.AccessControl;
 using System.Text;
+using CyrillicToLatin.Common;
+
 
 class ConsoleModule
 {
@@ -9,9 +12,9 @@ static void Main()
         string[] args = Environment.GetCommandLineArgs();
 
         // Get command line arguments.
-        if (args.Length != 3 || String.IsNullOrWhiteSpace(args[1]) || String.IsNullOrWhiteSpace(args[2]))
+        if (args.Length != 3 || string.IsNullOrWhiteSpace(args[1]) || string.IsNullOrWhiteSpace(args[2]))
         {
-            Console.WriteLine("There must be a source and a destination file.");
+            Console.WriteLine(Common.NoSourceOrDestinationFile);
             ShowSyntax();
             return;
         }
@@ -21,7 +24,7 @@ static void Main()
 
         if (!File.Exists(source))
         {
-            Console.WriteLine("The source file does not exist.");
+            Console.WriteLine(Common.NoSourceOrDestinationFile);
             return;
         }
 
@@ -74,12 +77,12 @@ static void Main()
         }
         catch (DirectoryNotFoundException e)
         {
-            Console.WriteLine($"Invalid directory: {e.Message}");
+            Console.WriteLine(Common.WrongDirectory);
             return;
         }
         catch (IOException e)
         {
-            Console.WriteLine($"I/O exception: {e.Message}");
+            Console.WriteLine(Common.WrongIO);
             return;
         }
     }
diff --git a/core/encoding/cyrillic-to-latin/cs/CyrillicToLatin.csproj b/core/encoding/cyrillic-to-latin/cs/CyrillicToLatin.csproj
index a4fb324cffe..92301346999 100644
--- a/core/encoding/cyrillic-to-latin/cs/CyrillicToLatin.csproj
+++ b/core/encoding/cyrillic-to-latin/cs/CyrillicToLatin.csproj
@@ -9,4 +9,10 @@
     <PackageReference Include="System.Text.Encoding.CodePages" Version="8.0.0" />
   </ItemGroup>
 
+  <ItemGroup>
+    <None Remove="Common\" />
+  </ItemGroup>
+  <ItemGroup>
+    <Folder Include="Common\" />
+  </ItemGroup>
 </Project>
diff --git a/core/encoding/cyrillic-to-latin/cs/CyrillicToLatinFallback.cs b/core/encoding/cyrillic-to-latin/cs/CyrillicToLatinFallback.cs
index 8fdee54dea8..c0d09e321c6 100644
--- a/core/encoding/cyrillic-to-latin/cs/CyrillicToLatinFallback.cs
+++ b/core/encoding/cyrillic-to-latin/cs/CyrillicToLatinFallback.cs
@@ -5,11 +5,11 @@
 
 class CyrillicToLatinFallback : EncoderFallback
 {
-    private Dictionary<Char, String> table;
+    private Dictionary<char, string> table;
 
     public CyrillicToLatinFallback()
     {
-        table = new Dictionary<Char, String>();
+        table = new Dictionary<char, string>();
         // Define mappings.
         // Uppercase modern Cyrillic characters.
         table.Add('\u0410', "A");
@@ -92,12 +92,12 @@ public override int MaxCharCount
 
 public class CyrillicToLatinFallbackBuffer : EncoderFallbackBuffer
 {
-    private Dictionary<Char, String> table;
+    private Dictionary<char, string> table;
     private int bufferIndex;
     private string buffer;
     private int leftToReturn;
 
-    internal CyrillicToLatinFallbackBuffer(Dictionary<Char, String> table)
+    internal CyrillicToLatinFallbackBuffer(Dictionary<char, string> table)
     {
         this.table = table;
         this.bufferIndex = -1;
@@ -153,4 +153,4 @@ public override int Remaining
     {
         get { return leftToReturn; }
     }
-}
+}
\ No newline at end of file
diff --git a/csharp/classes-quickstart/BankAccount.cs b/csharp/classes-quickstart/BankAccount.cs
index 6385c069d07..01ae6e84e36 100644
--- a/csharp/classes-quickstart/BankAccount.cs
+++ b/csharp/classes-quickstart/BankAccount.cs
@@ -1,11 +1,12 @@
 using System;
 using System.Collections.Generic;
+using classes.Contracts;
 
 namespace classes
 {
-    public class BankAccount
+    public class BankAccount : IBank
     {
-        public string Number { get; }
+        public string Number { get; set; }
         public string Owner { get; set; }
         #region BalanceComputation
         public decimal Balance
@@ -21,6 +22,7 @@ public decimal Balance
                 return balance;
             }
         }
+
         #endregion
 
         private static int accountNumberSeed = 1234567890;
@@ -36,7 +38,8 @@ public BankAccount(string name, decimal initialBalance)
         #endregion
 
         #region TransactionDeclaration
-        private List<Transaction> allTransactions = new List<Transaction>();
+
+        private List<ITransaction> allTransactions = new List<ITransaction>();
         #endregion
 
         #region DepositAndWithdrawal
@@ -82,4 +85,4 @@ public string GetAccountHistory()
         }
         #endregion
     }
-}
+}
\ No newline at end of file
diff --git a/csharp/classes-quickstart/Contracts/IBank.cs b/csharp/classes-quickstart/Contracts/IBank.cs
new file mode 100644
index 00000000000..ac1bcd4995a
--- /dev/null
+++ b/csharp/classes-quickstart/Contracts/IBank.cs
@@ -0,0 +1,14 @@
+using System;
+using System.Collections.Generic;
+
+namespace classes.Contracts
+{
+    public interface IBank
+    {
+        public string Number { get; }
+
+        public string Owner { get; }
+
+        public decimal Balance { get; }
+    }
+}
\ No newline at end of file
diff --git a/csharp/classes-quickstart/Contracts/ITransaction.cs b/csharp/classes-quickstart/Contracts/ITransaction.cs
new file mode 100644
index 00000000000..02c4d382a44
--- /dev/null
+++ b/csharp/classes-quickstart/Contracts/ITransaction.cs
@@ -0,0 +1,12 @@
+using System;
+namespace classes.Contracts
+{
+    public interface ITransaction
+    {
+        public decimal Amount { get; }
+
+        public DateTime Date { get; }
+
+        public string Notes { get; }
+    }
+}
\ No newline at end of file
diff --git a/csharp/classes-quickstart/classes.csproj b/csharp/classes-quickstart/classes.csproj
index 120e38c3150..5c938e63a4c 100644
--- a/csharp/classes-quickstart/classes.csproj
+++ b/csharp/classes-quickstart/classes.csproj
@@ -5,4 +5,10 @@
     <TargetFramework>net7.0</TargetFramework>
   </PropertyGroup>
 
+  <ItemGroup>
+    <None Remove="Contracts\" />
+  </ItemGroup>
+  <ItemGroup>
+    <Folder Include="Contracts\" />
+  </ItemGroup>
 </Project>
diff --git a/csharp/classes-quickstart/transaction.cs b/csharp/classes-quickstart/transaction.cs
index 198418c62dd..ca256132329 100644
--- a/csharp/classes-quickstart/transaction.cs
+++ b/csharp/classes-quickstart/transaction.cs
@@ -1,12 +1,13 @@
 using System;
+using classes.Contracts;
 
 namespace classes
 {
-    public class Transaction
+    public class Transaction : ITransaction
     {
-        public decimal Amount { get; }
+        public decimal Amount { get; set; }
         public DateTime Date { get; }
-        public string Notes { get; }
+        public string Notes { get; set; }
 
         public Transaction(decimal amount, DateTime date, string note)
         {
@@ -15,4 +16,4 @@ public Transaction(decimal amount, DateTime date, string note)
             this.Notes = note;
         }
     }
-}
+}                           
\ No newline at end of file
diff --git a/csharp/events/VersionOne.cs b/csharp/events/VersionOne.cs
index f9959043b2a..03913237fff 100644
--- a/csharp/events/VersionOne.cs
+++ b/csharp/events/VersionOne.cs
@@ -13,9 +13,11 @@ public class FileSearcher
 
     public void Search(string directory, string searchPattern)
     {
-        foreach (var file in Directory.EnumerateFiles(directory, searchPattern))
+        var enumeratedFiles = Directory.EnumerateFiles(directory, searchPattern);
+
+        foreach (var file in enumeratedFiles)
         {
             FileFound?.Invoke(this, new FileFoundArgs(file));
         }
     }
-}
+}
\ No newline at end of file
diff --git a/csharp/list-quickstart/Program.cs b/csharp/list-quickstart/Program.cs
index 631ef759793..fe4c4bde932 100644
--- a/csharp/list-quickstart/Program.cs
+++ b/csharp/list-quickstart/Program.cs
@@ -38,25 +38,16 @@ void WorkWithString()
     Console.WriteLine($"The list has {names.Count} people in it");
 
     var index = names.IndexOf("Felipe");
-    if (index == -1)
-    {
-        Console.WriteLine($"When an item is not found, IndexOf returns {index}");
-    }
-    else
-    {
-        Console.WriteLine($"The name {names[index]} is at index {index}");
-    }
+
+    Console.WriteLine(index == -1 
+        ? $"When an item is not found, IndexOf returns {index}"
+        : $"The name {names[index]} is at index {index}");
 
     index = names.IndexOf("Not Found");
-    if (index == -1)
-    {
-        Console.WriteLine($"When an item is not found, IndexOf returns {index}");
-    }
-    else
-    {
-        Console.WriteLine($"The name {names[index]} is at index {index}");
 
-    }
+    Console.WriteLine(index == -1 
+        ? $"When an item is not found, IndexOf returns {index}"
+        : $"The name {names[index]} is at index {index}");
 
     names.Sort();
     foreach (var name in names)
diff --git a/csharp/unit-testing/NUnit.TestProject/ByOrder.cs b/csharp/unit-testing/NUnit.TestProject/ByOrder.cs
index c7749d3584a..a9d97c43eed 100644
--- a/csharp/unit-testing/NUnit.TestProject/ByOrder.cs
+++ b/csharp/unit-testing/NUnit.TestProject/ByOrder.cs
@@ -10,7 +10,7 @@ public class ByOrder
         public static bool Test3Called;
 
         [Test, Order(5)]
-        public void Test1()
+        public void Should_Run_Last_After_Other_Tests_And_Validate_Previous_Execution_State()
         {
             Test3Called = true;
 
@@ -20,7 +20,7 @@ public void Test1()
         }
 
         [Test, Order(0)]
-        public void Test2B()
+        public void Should_Run_Second_After_First_Test_And_Validate_Only_First_Has_Run()
         {
             Test2BCalled = true;
 
@@ -30,7 +30,7 @@ public void Test2B()
         }
 
         [Test]
-        public void Test2A()
+        public void Should_Run_Third_When_No_Order_Is_Specified_And_All_Previous_Tests_Are_Called()
         {
             Test2ACalled = true;
 
@@ -40,7 +40,7 @@ public void Test2A()
         }
 
         [Test, Order(-5)]
-        public void Test3()
+        public void Should_Run_First_Before_All_Other_Tests_And_Ensure_No_Prior_Execution()
         {
             Test1Called = true;
 
@@ -49,4 +49,4 @@ public void Test3()
             Assert.That(Test3Called is false);
         }
     }
-}
+}
\ No newline at end of file