IDictionary does not inherit from IReadOnlyDictionary

[wdnijdam]

Is there an existing issue for this?

• I have searched the existing issues

Describe the bug

IDictionary is declared as

  public interface IDictionary<TKey, TValue> : 
    ICollection<KeyValuePair<TKey, TValue>>,
    IEnumerable<KeyValuePair<TKey, TValue>>,
    IEnumerable

The extension GetValueOrDefault() does not work on IDictionary because it is defined on IReadOnlyDictionary

Expected Behavior

IDictionary should implement interface IReadOnlyDictionary as well

Steps To Reproduce

Declare local variable of type IDictionary

Invoke var.GetValueOrDefault()

It cannot be resolved

Exceptions (if any)

No response

.NET Version

8.0.4

Anything else?

No response

[campersau]

See dotnet/runtime#31001

[martincostello]

See dotnet/runtime#101469.

My bad, that was reverted.

[martincostello]

Duplicate of dotnet/runtime#31001.

[mkArtakMSFT]

Thanks @martincostello!