dotnet-core/release-notes/3.0/preview/api-diff/preview4/3.0-preview4_System.Runtime.CompilerServices.md

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# System.Runtime.CompilerServices
``` diff
namespace System.Runtime.CompilerServices {
+ public static class Unsafe {
+ public unsafe static void* Add<T>(void* source, int elementOffset);
+ public static ref T Add<T>(ref T source, int elementOffset);
+ public static ref T Add<T>(ref T source, IntPtr elementOffset);
+ public static ref T AddByteOffset<T>(ref T source, IntPtr byteOffset);
+ public static bool AreSame<T>(ref T left, ref T right);
+ public static T As<T>(object o) where T : class;
+ public static ref TTo As<TFrom, TTo>(ref TFrom source);
+ public unsafe static void* AsPointer<T>(ref T value);
+ public unsafe static ref T AsRef<T>(void* source);
+ public static ref T AsRef<T>(in T source);
+ public static IntPtr ByteOffset<T>(ref T origin, ref T target);
+ public unsafe static void Copy<T>(void* destination, ref T source);
+ public unsafe static void Copy<T>(ref T destination, void* source);
+ public static void CopyBlock(ref byte destination, ref byte source, uint byteCount);
+ public unsafe static void CopyBlock(void* destination, void* source, uint byteCount);
+ public static void CopyBlockUnaligned(ref byte destination, ref byte source, uint byteCount);
+ public unsafe static void CopyBlockUnaligned(void* destination, void* source, uint byteCount);
+ public static void InitBlock(ref byte startAddress, byte value, uint byteCount);
+ public unsafe static void InitBlock(void* startAddress, byte value, uint byteCount);
+ public static void InitBlockUnaligned(ref byte startAddress, byte value, uint byteCount);
+ public unsafe static void InitBlockUnaligned(void* startAddress, byte value, uint byteCount);
+ public static bool IsAddressGreaterThan<T>(ref T left, ref T right);
+ public static bool IsAddressLessThan<T>(ref T left, ref T right);
+ public unsafe static T Read<T>(void* source);
+ public static T ReadUnaligned<T>(ref byte source);
+ public unsafe static T ReadUnaligned<T>(void* source);
+ public static int SizeOf<T>();
+ public unsafe static void* Subtract<T>(void* source, int elementOffset);
+ public static ref T Subtract<T>(ref T source, int elementOffset);
+ public static ref T Subtract<T>(ref T source, IntPtr elementOffset);
+ public static ref T SubtractByteOffset<T>(ref T source, IntPtr byteOffset);
+ public static ref T Unbox<T>(object box) where T : struct;
+ public unsafe static void Write<T>(void* destination, T value);
+ public static void WriteUnaligned<T>(ref byte destination, T value);
+ public unsafe static void WriteUnaligned<T>(void* destination, T value);
+ }
}
```