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OpCodes.Dup Field

Copies the current topmost value on the evaluation stack, and then pushes the copy onto the evaluation stack.

[Visual Basic]
Public Shared ReadOnly Dup As OpCode
[C#]
public static readonly OpCode Dup;
[C++]
public: static OpCode Dup;
[JScript]
public static var Dup : OpCode;

Remarks

The following table lists the instruction's hexadecimal and Microsoft Intermediate Language (MSIL) assembly format, along with a brief reference summary:

Format Assembly Format Description
25 dup Duplicates the value on the top of the stack.

The stack transitional behavior, in sequential order, is:

  1. value is pushed onto the stack.
  2. value is popped off of the stack for duplication.
  3. value is pushed back onto the stack.
  4. 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 constructor overload can use the dup opcode:

  • ILGenerator.Emit(OpCode)

Requirements

Platforms: Windows 98, Windows NT 4.0, Windows Millennium Edition, Windows 2000, Windows XP Home Edition, Windows XP Professional, Windows Server 2003 family

See Also

OpCodes Class | OpCodes Members | System.Reflection.Emit Namespace

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