diff --git a/Creational/DesignPatterns.Singleton/DesignPatterns.Singleton.csproj b/Creational/DesignPatterns.Singleton/DesignPatterns.Singleton.csproj
new file mode 100644
index 0000000..3a63532
--- /dev/null
+++ b/Creational/DesignPatterns.Singleton/DesignPatterns.Singleton.csproj
@@ -0,0 +1,9 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+    <PropertyGroup>
+        <TargetFramework>net8.0</TargetFramework>
+        <ImplicitUsings>enable</ImplicitUsings>
+        <Nullable>enable</Nullable>
+    </PropertyGroup>
+
+</Project>
diff --git a/Creational/DesignPatterns.Singleton/SingletonWithLazy.cs b/Creational/DesignPatterns.Singleton/SingletonWithLazy.cs
new file mode 100644
index 0000000..4484082
--- /dev/null
+++ b/Creational/DesignPatterns.Singleton/SingletonWithLazy.cs
@@ -0,0 +1,16 @@
+namespace DesignPatterns.Singleton;
+
+public class SingletonWithLazy
+{
+    private static readonly Lazy<SingletonWithLazy> instance = new(() => new SingletonWithLazy());
+
+    /// <summary>
+    /// The private constructor is declared to prevent instantiation directly, via calling a default constructor. 
+    /// </summary>
+    private SingletonWithLazy()
+    {
+        Console.WriteLine($"An instance of {nameof(SingletonWithLazy)} has been created.");
+    }
+
+    public static SingletonWithLazy Instance => instance.Value;
+}
diff --git a/Creational/DesignPatterns.Singleton/SingletonWithLock.cs b/Creational/DesignPatterns.Singleton/SingletonWithLock.cs
new file mode 100644
index 0000000..a7d9085
--- /dev/null
+++ b/Creational/DesignPatterns.Singleton/SingletonWithLock.cs
@@ -0,0 +1,28 @@
+namespace DesignPatterns.Singleton;
+
+public class SingletonWithLock
+{
+    private static SingletonWithLock? instance = null;
+    private static readonly object syncObject = new();
+
+    /// <summary>
+    /// The private constructor is declared to prevent instantiation directly, via calling a default constructor. 
+    /// </summary>
+    private SingletonWithLock()
+    {
+        Console.WriteLine($"An instance of {nameof(SingletonWithLock)} has been created.");
+    }
+
+    public static SingletonWithLock Instance
+    {
+        get
+        {
+            // The cost of executing the lock operation is significantly higher
+            // in comparison to the straightforward pointer check `instance != null`.
+            lock (syncObject)
+            {
+                return instance ??= new SingletonWithLock();
+            }
+        }
+    }
+}
diff --git a/DesignPatterns.sln b/DesignPatterns.sln
index ad127ee..e66c082 100644
--- a/DesignPatterns.sln
+++ b/DesignPatterns.sln
@@ -16,6 +16,8 @@ Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Structural", "Structural",
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "DesignPatterns.Decorator", "Structural\DesignPatterns.Decorator\DesignPatterns.Decorator.csproj", "{FA3C4F09-104E-4F7D-9ADB-E7F22917ADF7}"
 EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "DesignPatterns.Singleton", "Creational\DesignPatterns.Singleton\DesignPatterns.Singleton.csproj", "{658DB1C6-AC85-4E03-99C4-C79116E558F5}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -42,6 +44,10 @@ Global
 		{FA3C4F09-104E-4F7D-9ADB-E7F22917ADF7}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{FA3C4F09-104E-4F7D-9ADB-E7F22917ADF7}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{FA3C4F09-104E-4F7D-9ADB-E7F22917ADF7}.Release|Any CPU.Build.0 = Release|Any CPU
+		{658DB1C6-AC85-4E03-99C4-C79116E558F5}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{658DB1C6-AC85-4E03-99C4-C79116E558F5}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{658DB1C6-AC85-4E03-99C4-C79116E558F5}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{658DB1C6-AC85-4E03-99C4-C79116E558F5}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(NestedProjects) = preSolution
 		{DCE06EB6-BAB5-4573-AF67-128DBCCDB90C} = {7FF0E83F-EBEB-4103-BCD1-2F100E82FCD1}
@@ -49,5 +55,6 @@ Global
 		{0C5CFC73-F6E4-4796-A11C-9CA378B80517} = {AE005ED4-5F0B-4AF9-81AE-AAE3AD6F8901}
 		{1E56CC89-45C1-45F7-9EC8-88D648572816} = {AE005ED4-5F0B-4AF9-81AE-AAE3AD6F8901}
 		{FA3C4F09-104E-4F7D-9ADB-E7F22917ADF7} = {5961ADCC-5FA6-4076-A9F4-C1D3207ABE1A}
+		{658DB1C6-AC85-4E03-99C4-C79116E558F5} = {AE005ED4-5F0B-4AF9-81AE-AAE3AD6F8901}
 	EndGlobalSection
 EndGlobal