net9.0 
namespace System.Drawing.Drawing2D
{
    public sealed class Matrix : MarshalByRefObject, IDisposable
    {
        public bool IsIdentity { get; }
    }
}
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.NET 5.06.07.08.09.010.0
.NET Core 2.02.12.23.03.1
.NET Framework 1.01.12.03.03.54.04.54.5.14.5.24.64.6.14.6.24.74.7.14.7.24.84.8.1
.NET Standard 2.02.1
Information specific to net9.0
Assemblies

System.Drawing.Common , Version=9.0.0.0, PublicKeyToken=cc7b13ffcd2ddd51

System.Drawing.Common , Version=10.0.0.0, PublicKeyToken=cc7b13ffcd2ddd51

Referencing

Your project needs a package reference to System.Drawing.Common.

Package System.Drawing.Common (9.0.3) net9.0
Platform Restrictions

The property getter is only supported on the following platforms:

  • Windows >= 6.1
  • Built-in API
  • Package-provided API