Emit Method (OpCode)

ILGenerator.Emit Method (OpCode)

[ This article is for Windows Phone 8 developers. If you’re developing for Windows 10, see the latest documentation. ]

Puts the specified instruction onto the stream of instructions.

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

public virtual void Emit(
	OpCode opcode


Type: System.Reflection.Emit.OpCode
The Microsoft Intermediate Language (MSIL) instruction to be put onto the stream.

If the opcode parameter requires an argument, the caller must ensure that the argument length matches the length of the declared parameter. Otherwise, results will be unpredictable. For example, if the Emit instruction requires a 2-byte operand and the caller supplies a 4-byte operand, the runtime will emit two additional bytes to the instruction stream. These extra bytes will be Nop instructions.

The instruction values are defined in OpCodes.

The following example demonstrates the use of Emit method overloads to emit an instruction with no target, an instruction that requires a LocalBuilder, and an instruction that requires a Label. This code is part of a larger example provided for the BeginExceptionBlock method.

// The addition failed, but the function has to return an integer value, so
// store -1 in the local variable named result. Use the Leave instruction to
// exit the catch block. The finally block will be executed.
adderIL.Emit(OpCodes.Stloc, result);
adderIL.Emit(OpCodes.Leave_S, exTryCatchFinally);

Windows Phone OS

Supported in: 8.1, 8.0, 7.1

Windows Phone

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