XML序列化期间缺少SecurityProtocolType.Ssl3枚举值

我可以在我的计算机和几台计算机上很好地序列化这个对象的实例.但是在我测试的其中一台计算机上,我遇到以下异常:

System.InvalidOperationException: There was an error generating the XML document. ---> System.InvalidOperationException: Instance validation error: '4080' is not a valid value for System.Net.SecurityProtocolType.
at System.Xml.Serialization.XmlCustomFormatter.FromEnum(Int64 val, String[] vals, Int64[] ids, String typeName)
at Microsoft.Xml.Serialization.GeneratedAssembly.XmlSerializationWriterTestType.Write1_SecurityProtocolType(SecurityProtocolType v)
at Microsoft.Xml.Serialization.GeneratedAssembly.XmlSerializationWriterTestType.Write3_TestType(String n, String ns, TestType o, Boolean isNullable, Boolean needType)
at Microsoft.Xml.Serialization.GeneratedAssembly.XmlSerializationWriterTestType.Write4_TestType(Object o)

我已经比较了sgen.exe工作和失败案例的生成代码.在工作案例中,我生成了以下代码:

string Write1_SecurityProtocolType(global::System.Net.SecurityProtocolType v) {
    string s = null;
    switch (v) {
        case global::System.Net.SecurityProtocolType.@Ssl3: s = @"Ssl3"; break;
        case global::System.Net.SecurityProtocolType.@Tls: s = @"Tls"; break;
        case global::System.Net.SecurityProtocolType.@Tls11: s = @"Tls11"; break;
        case global::System.Net.SecurityProtocolType.@Tls12: s = @"Tls12"; break;
        default: s = FromEnum(((System.Int64)v), new string[] {@"Ssl3", 
            @"Tls", 
            @"Tls11", 
            @"Tls12"}, new System.Int64[] {(long)global::System.Net.SecurityProtocolType.@Ssl3, 
            (long)global::System.Net.SecurityProtocolType.@Tls, 
            (long)global::System.Net.SecurityProtocolType.@Tls11, 
            (long)global::System.Net.SecurityProtocolType.@Tls12}, @"System.Net.SecurityProtocolType"); break;
    }
    return s;
}

string Write1_SecurityProtocolType(global::System.Net.SecurityProtocolType v) {
    string s = null;
    switch (v) {
        case global::System.Net.SecurityProtocolType.@Tls: s = @"Tls"; break;
        case global::System.Net.SecurityProtocolType.@Tls11: s = @"Tls11"; break;
        case global::System.Net.SecurityProtocolType.@Tls12: s = @"Tls12"; break;
        default: s = FromEnum(((System.Int64)v), new string[] {@"Tls", 
            @"Tls11", 
            @"Tls12"}, new System.Int64[] {(long)global::System.Net.SecurityProtocolType.@Tls, 
            (long)global::System.Net.SecurityProtocolType.@Tls11, 
            (long)global::System.Net.SecurityProtocolType.@Tls12}, @"System.Net.SecurityProtocolType"); break;
    }
    return s;
}