1 files changed, 23 insertions, 0 deletions
diff --git a/release-notes/7.0/preview/api-diff/preview5/Microsoft.NETCore.App/7.0-preview5_System.IO.md b/release-notes/7.0/preview/api-diff/preview5/Microsoft.NETCore.App/7.0-preview5_System.IO.md
new file mode 100644
index 00000000..f177f46c
--- /dev/null
+++ b/release-notes/7.0/preview/api-diff/preview5/Microsoft.NETCore.App/7.0-preview5_System.IO.md
@@ -0,0 +1,23 @@
+# System.IO
+
+``` diff
+ namespace System.IO {
+     public static class File {
++        public static IAsyncEnumerable<string> ReadLinesAsync(string path, Encoding encoding, CancellationToken cancellationToken = default(CancellationToken));
++        public static IAsyncEnumerable<string> ReadLinesAsync(string path, CancellationToken cancellationToken = default(CancellationToken));
+     }
+     public class FileStream : Stream {
+         public virtual void Lock(long position, long length);
+         public virtual void Unlock(long position, long length);
+     }
+     public abstract class Stream : MarshalByRefObject, IAsyncDisposable, IDisposable {
++        public int ReadAtLeast(Span<byte> buffer, int minimumBytes, bool throwOnEndOfStream = true);
++        public ValueTask<int> ReadAtLeastAsync(Memory<byte> buffer, int minimumBytes, bool throwOnEndOfStream = true, CancellationToken cancellationToken = default(CancellationToken));
++        public void ReadExactly(byte[] buffer, int offset, int count);
++        public void ReadExactly(Span<byte> buffer);
++        public ValueTask ReadExactlyAsync(byte[] buffer, int offset, int count, CancellationToken cancellationToken = default(CancellationToken));
++        public ValueTask ReadExactlyAsync(Memory<byte> buffer, CancellationToken cancellationToken = default(CancellationToken));
+     }
+ }
+```
+