Add project files.

Core.Blueprint.KeyVault/Configuration/RegisterBlueprint.cs

@@ -0,0 +1,35 @@
+using Azure.Identity;
+using Azure.Security.KeyVault.Secrets;
+using Microsoft.Extensions.Configuration;
+using Microsoft.Extensions.DependencyInjection;
+
+namespace Core.Blueprint.KeyVault.Configuration
+{
+    /// <summary>
+    /// Registers the SecretClient for Azure Key Vault as a singleton service.
+    /// </summary>
+    /// <param name="services">The IServiceCollection to add the services to.</param>
+    /// <param name="configuration">The application's configuration.</param>
+    /// <returns>The updated IServiceCollection.</returns>
+    /// <exception cref="ArgumentNullException">Thrown when the KeyVault URI is missing in the configuration.</exception>
+    public static class RegisterBlueprint
+    {
+        public static IServiceCollection AddKeyVault(this IServiceCollection services, IConfiguration configuration)
+        {
+            var keyVaultUriString = configuration["ConnectionStrings:KeyVaultDAL"];
+
+            if (string.IsNullOrEmpty(keyVaultUriString))
+            {
+                throw new ArgumentNullException("ConnectionStrings:KeyVault", "KeyVault URI is missing in the configuration.");
+            }
+
+            var keyVaultUri = new Uri(keyVaultUriString);
+
+            // Register SecretClient as a singleton
+            services.AddSingleton(_ => new SecretClient(keyVaultUri, new DefaultAzureCredential()));
+
+            services.AddSingleton<IKeyVaultProvider, KeyVaultProvider>();
+            return services;
+        }
+    }
+}