D:\a\docs\docs\docs\csharp\language-reference\keywords\snippets\GenericWhereConstraints.cs(53,55): error CS8652: The feature 'allows ref struct constraint' is currently in Preview and *unsupported*. To use Preview features, use the 'preview' language version. [D:\a\docs\docs\docs\csharp\language-reference\keywords\snippets\keywords.csproj]

D:\a\docs\docs\docs\csharp\language-reference\keywords\snippets\GenericWhereConstraints.cs(53,55): error CS9240: Target runtime doesn't support by-ref-like generics. [D:\a\docs\docs\docs\csharp\language-reference\keywords\snippets\keywords.csproj]