Gets or sets a value that indicates that the value of the corresponding XML element definition's isNullable attribute is false.
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This setting overrides the XmlElementAttribute.IsNullable property of the System.Xml.Serialization.XmlElementAttribute attribute. It is set to true only when a SOAP header's type is neither System.Web.Services.Protocols.SoapHeader nor System.Web.Services.Protocols.SoapUnknownHeader.
You do not need to use the System.Xml.Serialization.XmlReflectionMember class and its properties directly.