Assembly: mscorlib (in mscorlib.dll)
The following table lists the instruction's hexadecimal and Microsoft Intermediate Language (MSIL) assembly format, along with a brief reference summary:
Duplicates the value on the top of the stack.
The stack transitional behavior, in sequential order, is:
value is pushed onto the stack.
value is popped off of the stack for duplication.
value is pushed back onto the stack.
A duplicate value is pushed onto the stack.
The dup instruction duplicates the top element of the stack, and leaves two identical values atop it.
The following Emit method overload can use the dup opcode:
Windows 98, Windows 2000 SP4, Windows Millennium Edition, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see System Requirements.