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OpCodes.Starg_S Field


Stores the value on top of the evaluation stack in the argument slot at a specified index, short form.

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

public static readonly OpCode Starg_S

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


Assembly Format


10 < unsigned int8 >

starg.s num

Pops the top value from the stack and stores it in argument slot num, short form.

The stack transitional behavior, in sequential order, is:

  1. The value currently on top of the stack is popped and placed in argument slot num.

The starg.s instruction pops a value from the stack and places it in argument slot num. The type of the value must match the type of the argument, as specified in the current method's signature.

The starg.s instruction provides an efficient encoding for use with the first 256 arguments.

For procedures that take a variable argument list, the starg.s instruction can be used only for the initial fixed arguments, not those in the variable part of the signature.

Performing a store into arguments that hold an integer value smaller than 4 bytes long truncates the value as it moves from the stack to the argument. Floating-point values are rounded from their native size (type F) to the size associated with the argument.

The following Emitmethod overload can use the starg.s opcode:

  • ILGenerator.Emit(OpCode, byte)

Universal Windows Platform
Available since 4.5
.NET Framework
Available since 1.1
Portable Class Library
Supported in: portable .NET platforms
Available since 2.0
Windows Phone Silverlight
Available since 7.1
Windows Phone
Available since 8.1
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