net11.0 
namespace System.Runtime.Caching
{
    public sealed class HostFileChangeMonitor : FileChangeMonitor
    {
        public override DateTimeOffset LastModified { get; }
    }
}
.NET
8.09.010.011.0
.NET Framework
4.04.54.5.14.5.24.64.6.14.6.24.74.7.14.7.24.84.8.1
Information specific to net11.0
Assemblies

System.Runtime.Caching , Version=11.0.0.0, PublicKeyToken=b03f5f7f11d50a3a

System.Runtime.Caching , Version=10.0.0.5, PublicKeyToken=b03f5f7f11d50a3a

Referencing

Your project needs a package reference to System.Runtime.Caching.

Package System.Runtime.Caching (11.0.0-preview.2.26159.112) net11.0
Platform Restrictions

The property getter is supported on any platform except for these:

  • wasi
  • Built-in API
  • Package-provided API