Cross framework serialization finish up (#20870)

* wip: add stubs for custom isEqual

* Updated blobs, small code refactoring, disabled CookieContainer test

* Fixed netfx471 detection

* add custom equals for graph with cycles

* fix few more comparers

* Merge

* fix few more test cases

* fix few more types, fix GetExtensionMethod to work with parameters with same type name but different generic params

* finish tests (2 comparisons are commented out: search for TODO)

* Adding TypeForward for DictionaryNode

* Updating blobs

* Update Cookie hashes, adding TypeForwards, removing unnecessary equality checks for CookieCollection

* Reenabling SortedDictionary test

* Update blobs

* make cookie.Timestamp to roundtrip correctly

* regenerate netfx and corefx blobs to account for Cookie.Timestamp change

* make regex fix the blob for ObjectWithArray

* fix ObjectWithArray netfx test failure

* Replacing Dictionary with Hashtable for desktop serialization support

* Update blobs

* Fixing a lot of TypeForwards, adding another hashtable test, other fixes

* Adding a few more TypeForwardedFrom attributes

* Updating the coreclr version, disabling CookieContainer test

* Update blobs

* Disabling CompareInfo test --> waiting for coreclr

* generate test cases

* update blobs, comment out not working cases

* fix null equality checks for new test cases and reenable them

* PR feedback addressed

* Fixed a typo...

* Updating used coreclr version, enabling compareinfo test again

2 files changed, 6 insertions, 6 deletions

diff --git a/src/System.Runtime.Numerics/src/System/Numerics/BigInteger.cs b/src/System.Runtime.Numerics/src/System/Numerics/BigInteger.cs
index 32fc0ba0cd..d9249ccfc3 100644
--- a/src/System.Runtime.Numerics/src/System/Numerics/BigInteger.cs
+++ b/src/System.Runtime.Numerics/src/System/Numerics/BigInteger.cs
@@ -21,8 +21,8 @@ namespace System.Numerics
 
         // For values int.MinValue < n <= int.MaxValue, the value is stored in sign
         // and _bits is null. For all other values, sign is +1 or -1 and the bits are in _bits
-        internal readonly int _sign;
-        internal readonly uint[] _bits;
+        internal readonly int _sign; // Do not rename (binary serialization)
+        internal readonly uint[] _bits; // Do not rename (binary serialization)
 
         // We have to make a choice of how to represent int.MinValue. This is the one
         // value that fits in an int, but whose negation does not fit in an int.
diff --git a/src/System.Runtime.Numerics/src/System/Numerics/Complex.cs b/src/System.Runtime.Numerics/src/System/Numerics/Complex.cs
index a087ce77f9..f42f22ba6e 100644
--- a/src/System.Runtime.Numerics/src/System/Numerics/Complex.cs
+++ b/src/System.Runtime.Numerics/src/System/Numerics/Complex.cs
@@ -13,7 +13,7 @@ namespace System.Numerics
     /// are real numbers, and i is the imaginary unit, with the property i2= -1.
     /// </summary>
     [Serializable]
-    [System.Runtime.CompilerServices.TypeForwardedFrom("System.Numerics, Version=4.0.0.0, PublicKeyToken=b77a5c561934e089")]
+    [System.Runtime.CompilerServices.TypeForwardedFrom("System.Numerics, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089")]
     public struct Complex : IEquatable<Complex>, IFormattable
     {
         public static readonly Complex Zero = new Complex(0.0, 0.0);
@@ -32,9 +32,9 @@ namespace System.Numerics
         private static readonly double s_log2 = Math.Log(2.0);
 
         // Do not rename, these fields are needed for binary serialization
-        private double m_real;
-        private double m_imaginary;
-        
+        private double m_real; // Do not rename (binary serialization)
+        private double m_imaginary; // Do not rename (binary serialization)
+
         public Complex(double real, double imaginary)
         {
             m_real = real;