Builder design pattern code

DesignPatterns/Builder/Builder.csproj

@@ -0,0 +1,10 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net6.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+</Project>

DesignPatterns/Builder/Program.cs

@@ -0,0 +1,104 @@
+#region Product Class
+public class Log
+{
+    public string Message { get; set; }
+    public string LogLevel { get; set; }
+
+    public override string ToString()
+    {
+        return $"{LogLevel}: {Message}";
+    }
+}
+#endregion
+
+#region  Builder Interface
+public interface ILogBuilder
+{
+    void SetMessage(string message);
+    void SetLogLevel(string logLevel);
+    Log GetLog();
+}
+#endregion
+
+#region Concrete Builder
+public class FileLogBuilder : ILogBuilder
+{
+    private Log _log = new Log();
+
+    public void SetMessage(string message)
+    {
+        _log.Message = message;
+    }
+
+    public void SetLogLevel(string logLevel)
+    {
+        _log.LogLevel = logLevel;
+    }
+
+    public Log GetLog()
+    {
+        Console.WriteLine("File logging is performed!");
+        return _log;
+    }
+}
+
+public class EmailLogBuilder : ILogBuilder
+{
+    private Log _log = new Log();
+
+    public void SetMessage(string message)
+    {
+        _log.Message = message;
+    }
+
+    public void SetLogLevel(string logLevel)
+    {
+        _log.LogLevel = logLevel;
+    }
+
+    public Log GetLog()
+    {
+        Console.WriteLine("Email logging is performed!");
+        return _log;
+    }
+}
+#endregion
+
+#region Director Class
+public class LogManager
+{
+    private readonly ILogBuilder _logBuilder;
+
+    public LogManager(ILogBuilder logBuilder)
+    {
+        _logBuilder = logBuilder;
+    }
+
+    public Log BuildLog(string message, string logLevel)
+    {
+        _logBuilder.SetMessage(message);
+        _logBuilder.SetLogLevel(logLevel);
+        return _logBuilder.GetLog();
+    }
+}
+#endregion
+
+#region Running the code
+class Program
+{
+    static void Main(string[] args)
+    {
+        var fileLogBuilder = new FileLogBuilder();
+        var fileLogManager = new LogManager(fileLogBuilder);
+
+        var fileLog = fileLogManager.BuildLog("Error occurred!", "ERROR");
+        Console.WriteLine(fileLog);
+
+        var emailLogBuilder = new EmailLogBuilder();
+        var emailLogManager = new LogManager(emailLogBuilder);
+
+        var emailLog = emailLogManager.BuildLog("Critical error!", "CRITICAL");
+        Console.WriteLine(emailLog);
+    }
+}
+#endregion

DesignPatterns/DesignPatterns.sln

@@ -11,6 +11,8 @@ Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Singleton", "Singleton\Sing
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Prototype", "Prototype\Prototype.csproj", "{13DBED8B-2791-4C7E-ACBC-8AE229128A58}"
 EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Builder", "Builder\Builder.csproj", "{D75423E8-FA00-4720-98A3-8918391D34D3}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -33,6 +35,10 @@ Global
 		{13DBED8B-2791-4C7E-ACBC-8AE229128A58}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{13DBED8B-2791-4C7E-ACBC-8AE229128A58}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{13DBED8B-2791-4C7E-ACBC-8AE229128A58}.Release|Any CPU.Build.0 = Release|Any CPU
+		{D75423E8-FA00-4720-98A3-8918391D34D3}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{D75423E8-FA00-4720-98A3-8918391D34D3}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{D75423E8-FA00-4720-98A3-8918391D34D3}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{D75423E8-FA00-4720-98A3-8918391D34D3}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE