il代码，

.assembly extern mscorlib {}.assembly Test{.ver 1:0:1:0}.module test.exe.method static void main() cil managed{.maxstack 5.entrypointldstr "Enter First Number"call void [mscorlib]System.Console::WriteLine (string)call  string [mscorlib]System.Console::ReadLine ()call int32 [mscorlib]System.Int32::Parse(string)ldstr "Enter Second Number"call void [mscorlib]System.Console::WriteLine (string)call  string [mscorlib]System.Console::ReadLine ()call int32 [mscorlib]System.Int32::Parse(string)ble smallerldstr "Second Number is smaller than first."    call void [mscorlib]System.Console::WriteLine (string)br exitsmaller:ldstr "First number is smaller than second."    call void [mscorlib]System.Console::WriteLine (string)
exit:    ret}

提示输入数，获取输入数，转换输入数为整型；然后这句实现比较，

ble smaller，它告诉编译器去检查栈里面的第一数是否小于或等于第二个数,如果是小于,那么它将会跳转到"smaller"这个标签处；

构建运行如下；

还不是很了解IL汇编和其跳转语句，有时间继续；