人还是比机器聪明

代码：

public int Add(int a, int b){    int c = 100;    return ((a + b) + c);}查看IL：.method public hidebysig instance int32 Add(int32 a, int32 b) cil managed{    .maxstack 2    .locals init (        [0] int32 c,        [1] int32 CS$1$0000)    L_0000: nop     L_0001: ldc.i4.s 100    L_0003: stloc.0     L_0004: ldarg.1     L_0005: ldarg.2     L_0006: add     L_0007: ldloc.0     L_0008: add     L_0009: stloc.1     L_000a: br.s L_000c    L_000c: ldloc.1     L_000d: ret }emit： var addMethod=tb.DefineMethod("Add", MethodAttributes.Public, CallingConventions.Standard, typeof(int), new Type[] { typeof(int), typeof(int) });            addMethod.DefineParameter(1,ParameterAttributes.None,"a");            addMethod.DefineParameter(2, ParameterAttributes.None, "b");            var il2=addMethod.GetILGenerator();            var lb=il2.DeclareLocal(typeof(int));            lb.SetLocalSymInfo("c");            il2.Emit(OpCodes.Ldc_I4, 100);            il2.Emit(OpCodes.Stloc, 0);            il2.Emit(OpCodes.Ldarg_1);            il2.Emit(OpCodes.Ldarg_2);            il2.Emit(OpCodes.Add);            il2.Emit(OpCodes.Ldloc_0);            il2.Emit(OpCodes.Add);            il2.Emit(OpCodes.Ret);查看：IL：.method public instance int32 Add(int32 a, int32 b) cil managed{    .maxstack 2    .locals init (        [0] int32 num)    L_0000: ldc.i4 100    L_0005: stloc num    L_0009: nop     L_000a: nop     L_000b: ldarg.1     L_000c: ldarg.2     L_000d: add     L_000e: ldloc.0     L_000f: add     L_0010: ret }代码：public int Add(int a, int b){    int num = 100;    return ((a + b) + num);}是否说明编译器还不够聪明呢？没自己写的IL简单。另外明明声明的局部变量是c，如何变成num了？