Update refs

Author: pranavkm

src/Http/WebUtilities/ref/Microsoft.AspNetCore.WebUtilities.netcoreapp3.0.cs

@@ -62,6 +62,28 @@ public override void SetLength(long value) { }
         public override void Write(byte[] buffer, int offset, int count) { }
         public override System.Threading.Tasks.Task WriteAsync(byte[] buffer, int offset, int count, System.Threading.CancellationToken cancellationToken) { throw null; }
     }
+    public sealed partial class FileBufferingWriteStream : System.IO.Stream
+    {
+        public FileBufferingWriteStream(System.IO.Stream writeStream, int memoryThreshold = 30720, long? bufferLimit = default(long?), System.Func<string> tempFileDirectoryAccessor = null) { }
+        public override bool CanRead { get { throw null; } }
+        public override bool CanSeek { get { throw null; } }
+        public override bool CanWrite { get { throw null; } }
+        public override long Length { get { throw null; } }
+        public override long Position { get { throw null; } set { } }
+        protected override void Dispose(bool disposing) { }
+        [System.Diagnostics.DebuggerStepThroughAttribute]
+        public override System.Threading.Tasks.ValueTask DisposeAsync() { throw null; }
+        public override void Flush() { }
+        [System.Diagnostics.DebuggerStepThroughAttribute]
+        public override System.Threading.Tasks.Task FlushAsync(System.Threading.CancellationToken cancellationToken) { throw null; }
+        public override int Read(byte[] buffer, int offset, int count) { throw null; }
+        public override System.Threading.Tasks.Task<int> ReadAsync(byte[] buffer, int offset, int count, System.Threading.CancellationToken cancellationToken) { throw null; }
+        public override long Seek(long offset, System.IO.SeekOrigin origin) { throw null; }
+        public override void SetLength(long value) { }
+        public override void Write(byte[] buffer, int offset, int count) { }
+        [System.Diagnostics.DebuggerStepThroughAttribute]
+        public override System.Threading.Tasks.Task WriteAsync(byte[] buffer, int offset, int count, System.Threading.CancellationToken cancellationToken) { throw null; }
+    }
     public partial class FileMultipartSection
     {
         public FileMultipartSection(Microsoft.AspNetCore.WebUtilities.MultipartSection section) { }
@@ -129,6 +151,8 @@ public HttpResponseStreamWriter(System.IO.Stream stream, System.Text.Encoding en
         public HttpResponseStreamWriter(System.IO.Stream stream, System.Text.Encoding encoding, int bufferSize, System.Buffers.ArrayPool<byte> bytePool, System.Buffers.ArrayPool<char> charPool) { }
         public override System.Text.Encoding Encoding { [System.Runtime.CompilerServices.CompilerGeneratedAttribute]get { throw null; } }
         protected override void Dispose(bool disposing) { }
+        [System.Diagnostics.DebuggerStepThroughAttribute]
+        public override System.Threading.Tasks.ValueTask DisposeAsync() { throw null; }
         public override void Flush() { }
         public override System.Threading.Tasks.Task FlushAsync() { throw null; }
         public override void Write(char value) { }