<PackageReference Include="System.ServiceModel.Primitives" Version="6.2.0" />

System.Runtime.InternalBufferManager

abstract class InternalBufferManager
namespace System.Runtime { internal abstract class InternalBufferManager { protected InternalBufferManager(); public abstract byte[] TakeBuffer(int bufferSize); public abstract void ReturnBuffer(byte[] buffer); public abstract void Clear(); public static InternalBufferManager Create(long maxBufferPoolSize, int maxBufferSize); } }