swap error messages

src/Compilers/CSharp/Portable/CSharpResources.Designer.cs

@@ -791,7 +791,7 @@ internal class CSharpResources {
         }
         
         /// <summary>
-        ///   Looks up a localized string similar to Field-like events are not allowed in readonly structs..
+        ///   Looks up a localized string similar to Auto-implemented instance properties in readonly structs must be readonly..
         /// </summary>
         internal static string ERR_AutoPropsInRoStruct {
             get {
@@ -4571,7 +4571,7 @@ internal class CSharpResources {
         }
         
         /// <summary>
-        ///   Looks up a localized string similar to Instance fields of readonly structs must be readonly..
+        ///   Looks up a localized string similar to Field-like events are not allowed in readonly structs..
         /// </summary>
         internal static string ERR_FieldlikeEventsInRoStruct {
             get {
@@ -4580,7 +4580,7 @@ internal class CSharpResources {
         }
         
         /// <summary>
-        ///   Looks up a localized string similar to Auto-implemented instance properties in readonly structs must be readonly..
+        ///   Looks up a localized string similar to Instance fields of readonly structs must be readonly..
         /// </summary>
         internal static string ERR_FieldsInRoStruct {
             get {

src/Compilers/CSharp/Portable/CSharpResources.resx

@@ -5124,12 +5124,12 @@ To remove the warning, you can use /reference instead (set the Embed Interop Typ
     <value>The type name '{0}' is reserved to be used by the compiler.</value>
   </data>
   <data name="ERR_FieldsInRoStruct" xml:space="preserve">
-    <value>Auto-implemented instance properties in readonly structs must be readonly.</value>
+    <value>Instance fields of readonly structs must be readonly.</value>
   </data>
   <data name="ERR_AutoPropsInRoStruct" xml:space="preserve">
-    <value>Field-like events are not allowed in readonly structs.</value>
+    <value>Auto-implemented instance properties in readonly structs must be readonly.</value>
   </data>
   <data name="ERR_FieldlikeEventsInRoStruct" xml:space="preserve">
-    <value>Instance fields of readonly structs must be readonly.</value>
+    <value>Field-like events are not allowed in readonly structs.</value>
   </data>
 </root>

src/Compilers/CSharp/Test/Semantic/Semantics/ReadOnlyStructsTests.cs

@@ -154,7 +154,6 @@ interface I1
     );
         }
 
-
         private static string ilreadonlyStructWithWriteableFieldIL = @"
 .class private auto ansi sealed beforefieldinit Microsoft.CodeAnalysis.EmbeddedAttribute
        extends [mscorlib]System.Attribute