dotnet-core/release-notes/2.1/Preview/api-diff/preview2/2.1-preview2_System.Text.md

System.Text

 namespace System.Text {
     public sealed class StringBuilder : ISerializable {
-        public bool Equals(ReadOnlySpan<char> value);
+        public bool Equals(ReadOnlySpan<char> span);
     }
 }