Fixes

src/Workspaces/Core/Portable/SymbolKey/SymbolKey.AnonymousTypeSymbolKey.cs

@@ -33,7 +33,7 @@ public static SymbolKeyResolution Resolve(SymbolKeyReader reader)
                 using var propertyIsReadOnly = reader.ReadBooleanArray();
                 using var propertyLocations = reader.ReadLocationArray();
 
-                if (propertyTypes.IsDefault)
+                if (!propertyTypes.IsDefault)
                 {
                     try
                     {

src/Workspaces/Core/Portable/SymbolKey/SymbolKey.SymbolKeyReader.cs

@@ -80,9 +80,7 @@ public int ReadInteger()
             }
 
             public int ReadFormatVersion()
-            {
-                return ReadIntegerRaw_DoNotCallDirectly();
-            }
+                => ReadIntegerRaw_DoNotCallDirectly();
 
             private int ReadIntegerRaw_DoNotCallDirectly()
             {

src/Workspaces/Core/Portable/SymbolKey/SymbolKey.SymbolKeyWriter.cs

@@ -203,16 +203,17 @@ private void WriteSpace()
             }
 
             internal void WriteFormatVersion()
-            {
-                _stringBuilder.AppendFormat(FormatVersion.ToString(CultureInfo.InvariantCulture));
-            }
+                => WriteIntegerRaw_DoNotCallDirectly(FormatVersion);
 
             internal void WriteInteger(int value)
             {
                 WriteSpace();
-                _stringBuilder.Append(value.ToString(CultureInfo.InvariantCulture));
+                WriteIntegerRaw_DoNotCallDirectly(value);
             }
 
+            private void WriteIntegerRaw_DoNotCallDirectly(int value)
+                => _stringBuilder.Append(value.ToString(CultureInfo.InvariantCulture));
+
             internal void WriteBoolean(bool value)
             {
                 WriteInteger(value ? 1 : 0);

src/Workspaces/Core/Portable/SymbolKey/SymbolKey.TupleTypeSymbolKey.cs

@@ -56,7 +56,7 @@ public static SymbolKeyResolution Resolve(SymbolKeyReader reader)
                     using var elementNames = reader.ReadStringArray();
                     var elementLocations = ReadElementLocations(reader);
 
-                    if (elementTypes.IsDefault)
+                    if (!elementTypes.IsDefault)
                     {
                         try
                         {