How to remove all objects (reset) from IMemoryCache in ASP.NET Core

See Cache in-memory in ASP.NET Core, specifically the section on
Cache dependencies.

Using a CancellationTokenSource allows multiple cache entries to be evicted as a group

This code worked for me:

public class CacheProvider 
{
    private static CancellationTokenSource _resetCacheToken = new CancellationTokenSource();
    private readonly IMemoryCache _innerCache;

    /* other methods and constructor removed for brevity */

    public T Set<T>(object key, T value) 
    {
        /* some other code removed for brevity */
        var options = new MemoryCacheEntryOptions().SetPriority(CacheItemPriority.Normal).SetAbsoluteExpiration(typeExpiration);
        options.AddExpirationToken(new CancellationChangeToken(_resetCacheToken.Token));

        _innerCache.Set(CreateKey(type, key), value, options);

        return value;
    }

    public void Reset()
    {
        if (_resetCacheToken != null && !_resetCacheToken.IsCancellationRequested && _resetCacheToken.Token.CanBeCanceled)
        {
            _resetCacheToken.Cancel();
            _resetCacheToken.Dispose();
        }

        _resetCacheToken = new CancellationTokenSource();
    }
}