OpCodes.Ldelem_U1 OpCodes.Ldelem_U1 OpCodes.Ldelem_U1 OpCodes.Ldelem_U1 Field


Loads the element with type unsigned int8 at a specified array index onto the top of the evaluation stack as an int32.

public: static initonly System::Reflection::Emit::OpCode Ldelem_U1;
public static readonly System.Reflection.Emit.OpCode Ldelem_U1;
 staticval mutable Ldelem_U1 : System.Reflection.Emit.OpCode
Public Shared ReadOnly Ldelem_U1 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
91 ldelem.u1 Loads the element with type unsigned int8 at index onto the top of the stack as an int32.

The stack transitional behavior, in sequential order, is:

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

  2. An index value index is pushed onto the stack.

  3. index and array are popped from the stack; the value stored at position index in array is looked up.

  4. The value is pushed onto the stack.

The ldelem.u1 instruction loads the value of the element with index index (type native int) in the zero-based one-dimensional array array and places it on the top of the stack. Arrays are objects and hence represented by a value of type O.

The return value for ldelem.u1 is int8.

Note that integer values of less than 4 bytes are extended to int32 (not native int) when they are loaded onto the evaluation stack.

NullReferenceException is thrown if array is a null reference.

ArrayTypeMismatchException is thrown if array does not hold elements of the required type.

IndexOutOfRangeException is thrown if index is negative, or larger than the bound of array.

The following Emit method overload can use the ldelem.u1 opcode:

  • ILGenerator.Emit(OpCode)

Applies to