linux-packaging-mono/mcs/class/referencesource/System.Workflow.Activities/Rules/UserDataKeys.cs

using System;

namespace System.Workflow.Activities.Rules
{
    internal static class RuleUserDataKeys
    {
        internal const string ErrorObject = "ErrorObject";
        internal const string QualifiedName = "QualifiedName"; // also defined in System.Workflow.ComponentModel.Design.CodeTypeReferenceSerializer
    }
}