The property gets or sets the property type of a property tag.
Assembly: EWS (in EWS.dll)
The property type of a property tag corresponds to the least significant word in a property tag.
In Microsoft .NET, a Long is a 64-bit signed integer, whereas in MAPI and COM, a Long is a 32-bit integer. Most developers will use the Microsoft .NET Framework to develop Exchange Web Services client applications. Therefore, the .NET naming is used instead of the MAPI naming. For example, the PR_MESSAGE_FLAGS MAPI property, 0x0E07, is a PT_LONG type. In .NET, this is considered an integer. An extended property for PR_MESSAGE_FLAGS is defined as <t:ExtendedFieldURI PropertyTag="0x0E07" PropertyType="Integer"/>.