version
assemblies
classes
structs
enums
interfaces
delegates
.NETCore 4.5
68
780
99
139
120
49
.NETCore 4.5.1
69
781
99
140
120
50
+1
+1
-
+1
-
+1

1 new and 68 updated
4.5 4.5.1
Microsoft.CSharp
Microsoft.VisualBasic
mscorlib
System
System.Collections
System.Collections.Concurrent
System.ComponentModel
System.ComponentModel.Annotations
System.ComponentModel.DataAnnotations
System.ComponentModel.EventBasedAsync
System.Core
System.Diagnostics.Contracts
System.Diagnostics.Debug
System.Diagnostics.Tools
System.Diagnostics.Tracing
System.Dynamic.Runtime
System.Globalization
System.IO
System.IO.Compression
System.Linq
System.Linq.Expressions
System.Linq.Parallel
System.Linq.Queryable
System.Net
System.Net.Http
System.Net.Http.Rtc
System.Net.NetworkInformation
System.Net.Primitives
System.Net.Requests
System.Numerics
System.ObjectModel
System.Reflection
System.Reflection.Context
System.Reflection.Extensions
System.Reflection.Primitives
System.Resources.ResourceManager
System.Runtime
System.Runtime.Extensions
System.Runtime.InteropServices
System.Runtime.InteropServices.WindowsRuntime
System.Runtime.Numerics
System.Runtime.Serialization
System.Runtime.Serialization.Json
System.Runtime.Serialization.Primitives
System.Runtime.Serialization.Xml
System.Runtime.WindowsRuntime
System.Runtime.WindowsRuntime.UI.Xaml
System.Security.Principal
System.ServiceModel
System.ServiceModel.Duplex
System.ServiceModel.Http
System.ServiceModel.NetTcp
System.ServiceModel.Primitives
System.ServiceModel.Security
System.ServiceModel.Web
System.Text.Encoding
System.Text.Encoding.Extensions
System.Text.RegularExpressions
System.Threading
System.Threading.Tasks
System.Threading.Tasks.Parallel
System.Threading.Timer
System.Windows
System.Xml
System.Xml.Linq
System.Xml.ReaderWriter
System.Xml.Serialization
System.Xml.XDocument
System.Xml.XmlSerializer

6 updated
4.5 4.5.1
new
updated
deleted
deprecated
System
-
1
-
-
System.Diagnostics.Tracing
-
2
-
-
System.IO
-
1
-
-
System.Runtime
1
1
-
-
System.Runtime.InteropServices
-
20
-
16
System.Threading
2
-
-
-
3
25
0
16

1 updated type
System.String class
Type has 1 new interface implementation
interface System.Collections.Generic.IEnumerable<Char>

2 updated types
System.Diagnostics.Tracing.EventSource class
Found 6 new members
property ConstructionException
property CurrentThreadActivityId
method SetCurrentThreadActivityId(Guid)
method SetCurrentThreadActivityId(Guid,Guid&)
method WriteEventWithRelatedActivityId(Int32,Guid,Object[])
method WriteEventWithRelatedActivityIdCore(Int32,Guid*,Int32,EventData*)
System.Diagnostics.Tracing.EventWrittenEventArgs class
Found 2 new members
property ActivityId
property RelatedActivityId

1 updated type
System.IO.WindowsRuntimeStreamExtensions class
Found 1 new member
method AsRandomAccessStream(Stream)

1 new and 1 updated type
System.Runtime.GCLargeObjectHeapCompactionMode enum
System.Runtime.GCSettings class
Found 1 new member
property LargeObjectHeapCompactionMode
System.Runtime.InteropServices.BStrWrapper class (deprecated)
Found 1 new custom attribute
[Obsolete("BStrWrapper and support for marshalling to the VARIANT type may be unavailable in future releases.")]
System.Runtime.InteropServices.ClassInterfaceType enum
Found 2 updated members
field AutoDispatch (deprecated)
Found 1 new custom attribute
[Obsolete("Support for IDispatch may be unavailable in future releases.")]
field AutoDual (deprecated)
Found 1 new custom attribute
[Obsolete("Support for IDispatch may be unavailable in future releases.")]
System.Runtime.InteropServices.ComAwareEventInfo class (deprecated)
Found 1 new custom attribute
[Obsolete("ComAwareEventInfo may be unavailable in future releases.")]
System.Runtime.InteropServices.ComEventInterfaceAttribute class (deprecated)
Found 1 new custom attribute
[Obsolete("ComEventInterfaceAttribute may be unavailable in future releases.")]
System.Runtime.InteropServices.ComEventsHelper class (deprecated)
Found 1 new custom attribute
[Obsolete("ComEventsHelper may be unavailable in future releases.")]
System.Runtime.InteropServices.ComInterfaceType enum
Found 2 updated members
field InterfaceIsDual (deprecated)
Found 1 new custom attribute
[Obsolete("Support for IDispatch may be unavailable in future releases.")]
field InterfaceIsIDispatch (deprecated)
Found 1 new custom attribute
[Obsolete("Support for IDispatch may be unavailable in future releases.")]
System.Runtime.InteropServices.ComSourceInterfacesAttribute class (deprecated)
Found 1 new custom attribute
[Obsolete("ComSourceInterfacesAttribute may be unavailable in future releases.")]
System.Runtime.InteropServices.CurrencyWrapper class (deprecated)
Found 1 new custom attribute
[Obsolete("CurrencyWrapper and support for marshalling to the VARIANT type may be unavailable in future releases.")]
System.Runtime.InteropServices.CustomQueryInterfaceMode enum (deprecated)
Found 1 new custom attribute
[Obsolete("CustomQueryInterfaceMode and support for ICustomQueryInterface may be unavailable in future releases.")]
System.Runtime.InteropServices.CustomQueryInterfaceResult enum (deprecated)
Found 1 new custom attribute
[Obsolete("CustomQueryInterfaceResult and support for ICustomQueryInterface may be unavailable in future releases.")]
System.Runtime.InteropServices.DispatchWrapper class (deprecated)
Found 1 new custom attribute
[Obsolete("DispatchWrapper and support for marshalling to the VARIANT type may be unavailable in future releases.")]
System.Runtime.InteropServices.ErrorWrapper class (deprecated)
Found 1 new custom attribute
[Obsolete("ErrorWrapper and support for marshalling to the VARIANT type may be unavailable in future releases.")]
System.Runtime.InteropServices.ICustomAdapter interface (deprecated)
Found 1 new custom attribute
[Obsolete("ICustomAdapter may be unavailable in future releases.")]
System.Runtime.InteropServices.ICustomQueryInterface interface (deprecated)
Found 1 new custom attribute
[Obsolete("ICustomQueryInterface may be unavailable in future releases.")]
System.Runtime.InteropServices.Marshal class
Found 16 new members
method CreateAggregatedObject<T>(IntPtr,T)
method CreateWrapperOfType<T, TWrapper>(T)
method DestroyStructure<T>(IntPtr)
method GetComInterfaceForObject<T, TInterface>(T)
method GetDelegateForFunctionPointer<TDelegate>(IntPtr)
method GetFunctionPointerForDelegate<TDelegate>(TDelegate)
method GetNativeVariantForObject<T>(T,IntPtr)
method GetObjectForNativeVariant<T>(IntPtr)
method GetObjectsForNativeVariants<T>(IntPtr,Int32)
method OffsetOf<T>(String)
method PtrToStructure<T>(IntPtr)
method PtrToStructure<T>(IntPtr,T)
method SizeOf()
method SizeOf<T>(T)
method StructureToPtr<T>(T,IntPtr,Boolean)
method UnsafeAddrOfPinnedArrayElement<T>(T[],Int32)
System.Runtime.InteropServices.SafeBuffer class (deprecated)
Found 1 new custom attribute
[Obsolete("SafeBuffer may be unavailable in future releases.")]
System.Runtime.InteropServices.UnknownWrapper class (deprecated)
Found 1 new custom attribute
[Obsolete("UnknownWrapper and support for marshalling to the VARIANT type may be unavailable in future releases.")]
System.Runtime.InteropServices.UnmanagedType enum
Found 9 updated members
field AnsiBStr (deprecated)
Found 1 new custom attribute
[Obsolete("Marshalling as AnsiBStr may be unavailable in future releases.")]
field AsAny (deprecated)
Found 1 new custom attribute
[Obsolete("Marshalling arbitrary types may be unavailable in future releases. Please specify the type you wish to marshal as.")]
field Currency (deprecated)
Found 1 new custom attribute
[Obsolete("Marshalling as Currency may be unavailable in future releases.")]
field IDispatch (deprecated)
Found 1 new custom attribute
[Obsolete("Marshalling as IDispatch may be unavailable in future releases.")]
field SafeArray (deprecated)
Found 1 new custom attribute
[Obsolete("Marshalling as SafeArray may be unavailable in future releases.")]
field Struct (deprecated)
Found 1 new custom attribute
[Obsolete("Applying UnmanagedType.Struct is unnecessary when marshalling a struct. Support for UnmanagedType.Struct when marshalling a reference type may be unavailable in future releases.")]
field TBStr (deprecated)
Found 1 new custom attribute
[Obsolete("Marshalling as TBstr may be unavailable in future releases.")]
field VariantBool (deprecated)
Found 1 new custom attribute
[Obsolete("Marshalling as VariantBool may be unavailable in future releases.")]
field VBByRefStr (deprecated)
Found 1 new custom attribute
[Obsolete("Marshalling as VBByRefString may be unavailable in future releases.")]
System.Runtime.InteropServices.VarEnum enum (deprecated)
Found 1 new custom attribute
[Obsolete("Marshalling VARIANTs may be unavailable in future releases.")]
System.Runtime.InteropServices.VariantWrapper class (deprecated)
Found 1 new custom attribute
[Obsolete("VariantWrapper and support for marshalling to the VARIANT type may be unavailable in future releases.")]

2 new types
System.Threading.Timer class
System.Threading.TimerCallback delegate

Excluded the following 2 custom attributes from the comparison.

System.ComponentModel.EditorBrowsableAttribute
System.Runtime.InteropServices.InterfaceTypeAttribute