有个dll 的方法在Reflectorr打开，C#和IL显示代码时分别如下，请问怎样才能反出来C#源程序，只能一行行根据IL代码写C#代码吗？有没有什么工具能转换？谢谢。

C#：

public static i a(string O1l)
{
    // This item is obfuscated and can not be translated.
}

IL：
.method public hidebysig static class i a(string O1l) cil managed
{
    .maxstack 2
    .locals init (
        [0] class i i,
        [1] bool flag,
        [2] int32 num)
    L_0000: br.s L_001b
    L_0002: ldloc num
    L_0006: switch (L_0049, L_007d, L_003b, L_0097)
    L_001b: nop
    L_001c: ldsfld class i a::k
    L_0021: ldnull
    L_0022: ceq
    L_0024: ldc.i4.0
    L_0025: ceq
    L_0027: stloc.1
    L_0028: ldc.i4.1
    L_0029: br.s L_002e
    L_002b: ldc.i4.0
    L_002c: br.s L_002e
    L_002e: brfalse.s L_0030
    L_0030: ldc.i4 2
    L_0035: stloc num
    L_0039: br.s L_0002
    L_003b: ldloc.1
    L_003c: brtrue.s L_004b
    L_003e: ldc.i4 0
    L_0043: stloc num
    L_0047: br.s L_0002
    L_0049: br.s L_007f
    L_004b: ldsfld class i a::k
    L_0050: ldstr "\u7cfb\u7edf\u6b63\u5728\u521d\u59cb\u5316"
    L_0055: callvirt instance void i::a(string)
    L_005a: nop
    L_005b: ldsfld class i a::k
    L_0060: callvirt instance void [System.Windows.Forms]System.Windows.Forms.Control::Show()
    L_0065: nop
    L_0066: call void [System.Windows.Forms]System.Windows.Forms.Application::DoEvents()
    L_006b: nop
    L_006c: ldsfld class i a::k
    L_0071: stloc.0
    L_0072: ldc.i4 1
    L_0077: stloc num
    L_007b: br.s L_0002
    L_007d: br.s L_0099
    L_007f: newobj instance void i::.ctor()
    L_0084: stsfld class i a::k
    L_0089: ldc.i4 3
    L_008e: stloc num
    L_0092: br L_0002
    L_0097: br.s L_004b
    L_0099: ldloc.0
    L_009a: ret
}

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