>>Following code
>>
>>I thought I would get 9 but I get 7
>>

>>	int i = 1;
>>
>>	i += (i += 2) + 3;
>>
>>	Console.WriteLine("{0}", i);
>>	Console.ReadLine();
>>

>>
>>Reason:
>>The value of i is loaded at the beginning of the operation and not at the end just before the addition is done
>>
>>

>>  .locals init ([0] int32 i)
>>  IL_0000:  nop
>>  IL_0001:  ldc.i4.1
>>  IL_0002:  stloc.0   
>>  IL_0003:  ldloc.0    // load i  for the first +=
>>  IL_0004:  ldloc.0   // load i   for the second +=
>>  IL_0005:  ldc.i4.2 
>>  IL_0006:  add     
>>  IL_0007:  dup
>>  IL_0008:  stloc.0   // this is (i += 2) that is stored in i
>>  IL_0009:  ldc.i4.3
>>  IL_000a:  add
>>  IL_000b:  add    // this is the original value of i, loaded in IL_0003
>>  IL_000c:  stloc.0  // i is overwritten
>>

>>
>>But this gives 9
>>

>>	int i = 1;
>>
>>	i += 2;
>>	i += i + 3;
>>

>>
>>

>>IL_0000:  nop
>>  IL_0001:  ldc.i4.1
>>  IL_0002:  stloc.0
>>  IL_0003:  ldloc.0
>>  IL_0004:  ldc.i4.2
>>  IL_0005:  add
>>  IL_0006:  stloc.0
>>  IL_0007:  ldloc.0
>>  IL_0008:  ldloc.0
>>  IL_0009:  ldc.i4.3
>>  IL_000a:  add
>>  IL_000b:  add
>>  IL_000c:  stloc.0
>>

>
>Exactly the results I would expect,
>

>int i = 1;
>i += (i += 2) + 3;
>

is same as writing:
>
>

>int i = 1;
>i = i + (i = i + 2) + 3; // i = 1 + ( 1+2 ) + 3
>

and
>

>int i = 1;
>i += 2;
>i += i + 3;
>

is same as writing:
>
>

>int i = 1;
>i = i + 2; // i = 3
>i = i + i + 3; // i = 3+3+3
>

Cetin



I thought it would use/fetch the value of i just before the addition would be done, ie the latest value

int i = 1;
i += ++i;  // 3 and not 4