<PackageReference Include="System.ServiceModel.Primitives" Version="8.0.0" />

System.ServiceModel.OperationContractAttribute

public sealed class OperationContractAttribute : Attribute
public string Action { get; set; }

public bool AsyncPattern { get; set; }

public bool HasProtectionLevel { get; }

public bool IsInitiating { get; set; }

public bool IsOneWay { get; set; }

public bool IsTerminating { get; set; }

public string Name { get; set; }

public ProtectionLevel ProtectionLevel { get; set; }

public string ReplyAction { get; set; }

public OperationContractAttribute()