Add FactoryMethod.

Creational/DesignPatterns.FactoryMethod/AzureStorageDownloader.cs

@@ -0,0 +1,19 @@
+using Azure.Storage.Blobs;
+
+namespace DesignPatterns.FactoryMethod;
+
+public class AzureStorageDownloader : IFileDownloader
+{
+    private readonly BlobContainerClient containerClient;
+
+    public AzureStorageDownloader(string connectionString, string containerName)
+    {
+        this.containerClient = new BlobContainerClient(connectionString, containerName);
+    }
+
+    public void DownloadFile(string fileName, string destinationPath)
+    {
+        BlobClient blobClient = this.containerClient.GetBlobClient(fileName);
+        blobClient.DownloadTo(destinationPath);
+    }
+}

Creational/DesignPatterns.FactoryMethod/AzureStorageFactory.cs

@@ -0,0 +1,23 @@
+namespace DesignPatterns.FactoryMethod;
+
+public class AzureStorageFactory : IStorageServiceFactory
+{
+    private readonly string connectionString;
+    private readonly string containerName;
+
+    public AzureStorageFactory(string connectionString, string containerName)
+    {
+        this.connectionString = connectionString;
+        this.containerName = containerName;
+    }
+
+    public IFileUploader CreateUploader()
+    {
+        return new AzureStorageUploader(this.connectionString, this.containerName);
+    }
+
+    public IFileDownloader CreateDownloader()
+    {
+        return new AzureStorageDownloader(this.connectionString, this.containerName);
+    }
+}

Creational/DesignPatterns.FactoryMethod/AzureStorageUploader.cs

@@ -0,0 +1,20 @@
+using Azure.Storage.Blobs;
+
+namespace DesignPatterns.FactoryMethod;
+
+public class AzureStorageUploader : IFileUploader
+{
+    private readonly BlobContainerClient containerClient;
+
+    public AzureStorageUploader(string connectionString, string containerName)
+    {
+        this.containerClient = new BlobContainerClient(connectionString, containerName);
+    }
+
+    public void UploadFile(string filePath)
+    {
+        var fileName = Path.GetFileName(filePath);
+        var blobClient = this.containerClient.GetBlobClient(fileName);
+        blobClient.Upload(filePath, true);
+    }
+}

Creational/DesignPatterns.FactoryMethod/DesignPatterns.FactoryMethod.csproj

@@ -0,0 +1,13 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+    <PropertyGroup>
+        <TargetFramework>net8.0</TargetFramework>
+        <ImplicitUsings>enable</ImplicitUsings>
+        <Nullable>enable</Nullable>
+    </PropertyGroup>
+
+    <ItemGroup>
+      <PackageReference Include="Azure.Storage.Files.DataLake" Version="12.17.1" />
+    </ItemGroup>
+
+</Project>

Creational/DesignPatterns.FactoryMethod/IFileDownloader.cs

@@ -0,0 +1,6 @@
+namespace DesignPatterns.FactoryMethod;
+
+public interface IFileDownloader
+{
+    void DownloadFile(string fileName, string destinationPath);
+}

Creational/DesignPatterns.FactoryMethod/IFileUploader.cs

@@ -0,0 +1,6 @@
+namespace DesignPatterns.FactoryMethod;
+
+public interface IFileUploader
+{
+    void UploadFile(string filePath);
+}

Creational/DesignPatterns.FactoryMethod/IStorageServiceFactory.cs

@@ -0,0 +1,7 @@
+namespace DesignPatterns.FactoryMethod;
+
+public interface IStorageServiceFactory
+{
+    IFileUploader CreateUploader();
+    IFileDownloader CreateDownloader();
+}

DesignPatterns.sln

@@ -20,6 +20,8 @@ Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "DesignPatterns.Singleton",
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "DesignPatterns.Singleton.UnitTests", "Creational\DesignPatterns.Singleton.UnitTests\DesignPatterns.Singleton.UnitTests.csproj", "{FFB0861F-5182-40CA-BD19-33BCB0FBA4F6}"
 EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "DesignPatterns.FactoryMethod", "Creational\DesignPatterns.FactoryMethod\DesignPatterns.FactoryMethod.csproj", "{DAE417C1-F239-4514-9689-6466F0B52A99}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -54,6 +56,10 @@ Global
 		{FFB0861F-5182-40CA-BD19-33BCB0FBA4F6}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{FFB0861F-5182-40CA-BD19-33BCB0FBA4F6}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{FFB0861F-5182-40CA-BD19-33BCB0FBA4F6}.Release|Any CPU.Build.0 = Release|Any CPU
+		{DAE417C1-F239-4514-9689-6466F0B52A99}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{DAE417C1-F239-4514-9689-6466F0B52A99}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{DAE417C1-F239-4514-9689-6466F0B52A99}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{DAE417C1-F239-4514-9689-6466F0B52A99}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(NestedProjects) = preSolution
 		{DCE06EB6-BAB5-4573-AF67-128DBCCDB90C} = {7FF0E83F-EBEB-4103-BCD1-2F100E82FCD1}
@@ -63,5 +69,6 @@ Global
 		{FA3C4F09-104E-4F7D-9ADB-E7F22917ADF7} = {5961ADCC-5FA6-4076-A9F4-C1D3207ABE1A}
 		{658DB1C6-AC85-4E03-99C4-C79116E558F5} = {AE005ED4-5F0B-4AF9-81AE-AAE3AD6F8901}
 		{FFB0861F-5182-40CA-BD19-33BCB0FBA4F6} = {AE005ED4-5F0B-4AF9-81AE-AAE3AD6F8901}
+		{DAE417C1-F239-4514-9689-6466F0B52A99} = {AE005ED4-5F0B-4AF9-81AE-AAE3AD6F8901}
 	EndGlobalSection
 EndGlobal