Added EncryptedAttribute

Aspects/EncryptedAttribute.cs

@@ -0,0 +1,33 @@
+using System;
+
+namespace vm.Aspects
+{
+    /// <summary>
+    /// EncryptedAttribute marks a property, field, return value or a parameter as being encrypted.
+    /// This class cannot be inherited.
+    /// </summary>
+    [Serializable]
+    [AttributeUsage(
+        AttributeTargets.Field |
+        AttributeTargets.Property |
+        AttributeTargets.ReturnValue |
+        AttributeTargets.Parameter,
+        AllowMultiple = false,
+        Inherited = true)]
+    public sealed class EncryptedAttribute : Attribute
+    {
+        /// <summary>
+        /// Gets a string that can be used to resolve which cipher should be selected from the DI container.
+        /// </summary>
+        public string CipherResolver { get; }
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="EncryptedAttribute"/> class.
+        /// </summary>
+        /// <param name="cipherResolver">An optional string that can be used to resolve which cipher should be selected from the DI container.</param>
+        public EncryptedAttribute(string cipherResolver = null)
+        {
+            CipherResolver = cipherResolver;
+        }
+    }
+}

Aspects/vm.Aspects.csproj

@@ -256,6 +256,7 @@
     <Compile Include="DIContainer.ExtensionsRegister.cs" />
     <Compile Include="DIContainer.GenericExtensions.cs" />
     <Compile Include="DIContainer.GenericExtensions2.cs" />
+    <Compile Include="EncryptedAttribute.cs" />
     <Compile Include="EnumFlagsExtensions.cs" />
     <Compile Include="Exceptions\BusinessException.cs" />
     <Compile Include="Exceptions\InvalidObjectException.cs" />