OpCodes.Unbox_Any Field


Converts the boxed representation of a type specified in the instruction to its unboxed form.

public: static initonly System::Reflection::Emit::OpCode Unbox_Any;
public static readonly System.Reflection.Emit.OpCode Unbox_Any;
 staticval mutable Unbox_Any : System.Reflection.Emit.OpCode
Public Shared ReadOnly Unbox_Any As OpCode 

Field Value


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
A5 < T > unbox.any typeTok Extract the data from obj, its boxed representation.

The stack transitional behavior, in sequential order, is:

  1. An object reference obj is pushed onto the stack.

  2. The object reference is popped from the stack and unboxed to the type specified in the instruction.

  3. The resulting object reference or value type is pushed onto the stack.

When applied to the boxed form of a value type, the unbox.any instruction extracts the value contained within obj (of type O), and is therefore equivalent to unbox followed by ldobj.

When applied to a reference type, the unbox.any instruction has the same effect as castclass typeTok.

If the operand typeTok is a generic type parameter, then the runtime behavior is determined by the type that is specified for that generic type parameter.

InvalidCastException is thrown if obj is not a boxed type.

NullReferenceException is thrown if obj is a null reference.

The following Emit method overload can use the unbox.any opcode:

Applies to