…71136)

… proposal (dotnet#71271)

dotnet/csharplang#7768

…ections (dotnet#71325)

…#71334)

…otnet#71421)

Implements changes proposed in dotnet/csharplang#7792.

- Params Collections in attributes
- Params Collections in lambdas
- Params Collections and interpolated string handler
- Order of evaluation:
  - named arguments
  - compound assignment
  - object initializer

Also fixes dotnet#71488.

…uring merge from 'main'. (dotnet#71558)

… VB tests. (dotnet#71598)

…otnet#71747)

Corresponding speclet update is dotnet/csharplang#7850

Closes dotnet#71816.

https://github.com/dotnet/csharplang/blob/main/proposals/params-collections.md#method-parameters

…ct. (dotnet#72000)

UnscopedRefAttribute can be used to override that.
https://github.com/dotnet/csharplang/blob/main/proposals/params-collections.md#ref-safety

Related to dotnet#72224.
Related to dotnet#72225.
Related to dotnet#72227.

…72399)

…is suppressible. (dotnet#72426)

…ections (dotnet#72498)

Closes dotnet#72461.