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OpCodes.Stobj Field

Copies a value of a specified type from the evaluation stack into a supplied memory address.

Namespace: System.Reflection.Emit
Assembly: mscorlib (in mscorlib.dll)

public static readonly OpCode Stobj
public static final OpCode Stobj
public static final var Stobj : OpCode
Not applicable.

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

81 < T >

stobj class

Stores a value of type class from the stack into memory.

The stack transitional behavior, in sequential order, is:

  1. An address is pushed onto the stack.

  2. A value type object of type class is pushed onto the stack.

  3. The object and the address are popped from the stack; the value type object is stored at the address.

The stobj instruction copies the value type object into the address specified by the address (a pointer of type native int, *, or &). The number of bytes copied depends on the size of the class represented by class, a metadata token representing a value type.

The operation of the stobj instruction can be altered by an immediately preceding Volatile or Unaligned prefix instruction.

TypeLoadException is thrown if class cannot be found. This is typically detected when Microsoft Intermediate Language (MSIL) instructions are converted to native code rather than at run time.

The following Emit method overload can use the stobj opcode:

  • ILGenerator.Emit(OpCode, Type)

Windows 98, Windows Server 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 Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0, 2.0, 1.1, 1.0

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