This issue tracks the work for implementing CoreCLR support for InlineArrayAttribute #61135 and the related C# features such as params ReadOnlySpan, safe fixed size buffers, stackalloc of reference types, etc.

Required work:

• Implement struct layout support for InlineArrayAttribute - CoreCLR support for InlineArrayAttribute. (struct layout part) #82744
• Implement diagnostics support for structs with an InlineArrayAttribute
• Create custom InlineArray marshaller for LibraryImport generator #86572