c# - Update reference without decompiling source? -


i'm searching way change referenced dll in .net exe.

why? have crackme, , crack it, i'm not allowed use reflector modify (would easy - am allowed read source). must way. (that's challenge of crackme)

problem source obfuscated control flow , i'm not allowed use automatic tool solve it, doing manually long , painful.

the crackme uses open-source library embedded work, download source of library, modify "dump" code (because crackme uses api , gives serial api, modify dump), put in crackme, run , key in desktop.

it should (but not mandatory) done ildasm.

so, question is: is there way "update" referenced dll own?

you can disassemble assembly il-code using ildasm. can use following command:

ildasm.exe <yourassembly> /output:yourassemblyilcode.il

now can change assembly reference (version , public key token) in il-code. references external assembly in il code looks this:

.assembly extern system {   .publickeytoken = (b7 7a 5c 56 19 34 e0 89 )                            .ver 2:0:0:0 }

then can assemble corrected il-file .net assembly using ilasm.exe


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