Remove TKey : notnull constraint from `IDictionary<TKey, TValue>`#793

Merged

safern merged 3 commits intodotnet:masterfrom

stephentoub:idictionarynotnull

Dec 13, 2019

Commits on Dec 12, 2019

Remove TKey : notnull constraint from `IDictionary<TKey, TValue>`
stephentoub
committed
Remove TKey : notnull constraint from `IReadOnlyDictionary<TKey, TValue>`
stephentoub
committed
Remove notnull constraints from extension methods on those interfaces
stephentoub
committed