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Gets or sets the value of the If-Modified-Since HTTP header.
Assembly: System.Http (in System.Http.dll)
The property is a standard System..::..DateTime object and can contain a System..::..DateTimeKind field of DateTimeKind..::..Local, DateTimeKind..::..Utc, or . Any kind of time can be set when using the property. If is set or retrieved, the property is assumed to be DateTimeKind..::..Local (local time).
The classes in the System.Net namespace always write it out the property on the wire during transmission in standard form using GMT (Utc) format.
- Full trust for the immediate caller. This member cannot be used by partially trusted code. For more information, see dd66cd4c-b087-415f-9c3e-94e3a1835f74.