IL汇编学习笔记1（Console.WriteLine之参数）

public void ConsoleWriteLine0()
{
    Console.WriteLine("hi" + 3);
}

public void ConsoleWriteLine1()
{
    Console.WriteLine("hi{0}", 3);

}

 

.method public hidebysig instance void ConsoleWriteLine0() cil managed

{

    .maxstack 8

    L_0000: ldstr "hi"

    L_0005: ldc.i4.3 

    L_0006: box int32

    L_000b: call string [mscorlib]System.String::Concat(object, object)

    L_0010: call void [mscorlib]System.Console::WriteLine(string)

    L_0015: ret 

}



 


.method public hidebysig instance void ConsoleWriteLine1() cil managed

{

    .maxstack 8

    L_0000: ldstr "hi{0}"

    L_0005: ldc.i4.3 

    L_0006: box int32

    L_000b: call void [mscorlib]System.Console::WriteLine(string, object)

    L_0010: ret 

}

显然，ConsoleWriteLine0比ConsoleWriteLine1多耗费了1次函数调用，因此推荐使用ConsoleWriteLine1。