BindablePropertyAttribute, PropertyAttribute and Accessorccessibility now only compile if .Net Standard 2.0 or higher and .Net 6.0 or higher

Author: ShawnLaMountain

src/ThunderDesign.Net-PCL.Threading.Shared/Attributes/BindablePropertyAttribute.cs

@@ -5,6 +5,7 @@
 
 namespace ThunderDesign.Net.Threading.Attributes
 {
+#if NETSTANDARD2_0_OR_GREATER || NET6_0_OR_GREATER
     [AttributeUsage(AttributeTargets.Field, Inherited = false, AllowMultiple = false)]
     public sealed class BindablePropertyAttribute : Attribute
     {
@@ -22,56 +23,57 @@ public BindablePropertyAttribute(
             AccessorAccessibility getter = AccessorAccessibility.Public,
             AccessorAccessibility setter = AccessorAccessibility.Public)
         {
-            ApplyBindablePropertyAttribute(readOnly, threadSafe, notify, new string[0], getter, setter);
+            ApplyBindablePropertyAttribute(Array.Empty<string>(), readOnly, threadSafe, notify, getter, setter);
         }
 
         public BindablePropertyAttribute(
+            string alsoNotify,
             bool readOnly = false,
             bool threadSafe = true,
             bool notify = true,
-            string alsoNotify = null,
             AccessorAccessibility getter = AccessorAccessibility.Public,
             AccessorAccessibility setter = AccessorAccessibility.Public)
         {
-            ApplyBindablePropertyAttribute(readOnly, threadSafe, notify, string.IsNullOrEmpty(alsoNotify) ? new string[0] : new string[] { alsoNotify }, getter, setter);
+            ApplyBindablePropertyAttribute(string.IsNullOrEmpty(alsoNotify) ? Array.Empty<string>() : new string[1] { alsoNotify }, readOnly, threadSafe, notify, getter, setter);
         }
 
         public BindablePropertyAttribute(
-            string[] alsoNotify = null,
+            string[] alsoNotify,
             bool readOnly = false,
             bool threadSafe = true,
             bool notify = true,
             AccessorAccessibility getter = AccessorAccessibility.Public,
             AccessorAccessibility setter = AccessorAccessibility.Public)
         {
-            ApplyBindablePropertyAttribute(readOnly, threadSafe, notify, alsoNotify ?? new string[0], getter, setter);
+            ApplyBindablePropertyAttribute(alsoNotify ?? Array.Empty<string>(), readOnly, threadSafe, notify, getter, setter);
         }
 
         public BindablePropertyAttribute(
+            IEnumerable<string> alsoNotify,
             bool readOnly = false,
             bool threadSafe = true,
-            IEnumerable<string> alsoNotify = null,
             AccessorAccessibility getter = AccessorAccessibility.Public,
             AccessorAccessibility setter = AccessorAccessibility.Public,
             bool notify = true)
         {
-            ApplyBindablePropertyAttribute(readOnly, threadSafe, notify, alsoNotify?.ToArray() ?? new string[0], getter, setter);
+            ApplyBindablePropertyAttribute(alsoNotify?.ToArray() ?? Array.Empty<string>(), readOnly, threadSafe, notify, getter, setter);
         }
 
-        public void ApplyBindablePropertyAttribute(
-            bool readOnly = false,
-            bool threadSafe = true,
-            bool notify = true,
-            string[] alsoNotify = null,
-            AccessorAccessibility getter = AccessorAccessibility.Public,
-            AccessorAccessibility setter = AccessorAccessibility.Public)
+        private void ApplyBindablePropertyAttribute(
+            string[] alsoNotify,
+            bool readOnly,
+            bool threadSafe,
+            bool notify,
+            AccessorAccessibility getter,
+            AccessorAccessibility setter)
         {
             ReadOnly = readOnly;
             ThreadSafe = threadSafe;
             Notify = notify;
-            AlsoNotify = alsoNotify ?? new string[0];
+            AlsoNotify = alsoNotify;
             Getter = getter;
             Setter = setter;
         }
     }
+#endif
 }

src/ThunderDesign.Net-PCL.Threading.Shared/Attributes/PropertyAttribute.cs

@@ -3,6 +3,7 @@
 
 namespace ThunderDesign.Net.Threading.Attributes
 {
+#if NETSTANDARD2_0_OR_GREATER || NET6_0_OR_GREATER
     [AttributeUsage(AttributeTargets.Field, AllowMultiple = false, Inherited = false)]
     public sealed class PropertyAttribute : Attribute
     {
@@ -23,4 +24,5 @@ public PropertyAttribute(
             Setter = setter;
         }
     }
+#endif
 }

src/ThunderDesign.Net-PCL.Threading.Shared/Enums/AccessorAccessibility.cs

@@ -1,5 +1,6 @@
 namespace ThunderDesign.Net.Threading.Enums
 {
+#if NETSTANDARD2_0_OR_GREATER || NET6_0_OR_GREATER
     public enum AccessorAccessibility
     {
         Public,
@@ -9,4 +10,5 @@ public enum AccessorAccessibility
         ProtectedInternal,
         PrivateProtected
     }
+#endif
 }