net481 
namespace System.ServiceModel.Channels
{
    public abstract class MessageFault
    {
        public bool IsMustUnderstandFault { get; }
    }
}
.NET Framework 3.03.54.04.54.5.14.5.24.64.6.14.6.24.74.7.14.7.24.84.8.1
Information specific to net481
Assembly

System.ServiceModel , Version=4.0.0.0, PublicKeyToken=b77a5c561934e089

Referencing

Your project needs an assembly reference to System.ServiceModel.

Platform Restrictions

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  • Package-provided API