How to patch .NET DLLs?

[SystemeD]

Originally Posted by zacdac

...but for an asp.net assembly you will need to also patch the strong named attribute which is stored as meta data before the RAS key.

Could you be more explicit?
Here is some of the output from ildasm for the target we are talking about, what must be patched for an aspnet assembly?
Thanks

.custom instance void DotfuscatorAttribute::.ctor(string) = ( 01 00 16 31 34 32 32 31 3A 31 3A 32 2E 30 2E 31   // ...14221:1:2.0.1
                                                                36 39 37 2E 31 38 34 38 35 )                      // 697.18485
  .custom instance void [mscorlib]System.Reflection.AssemblyConfigurationAttribute::.ctor(string) = ( 01 00 00 00 00 ) 
  .publickey = (00 24 00 00 04 80 00 00 94 00 00 00 06 02 00 00   // .$..............
                00 24 00 00 52 53 41 31 00 04 00 00 01 00 01 00   // .$..RSA1........
                CD 62 12 05 0E 7C CD 6F 51 AF 2C 41 FD CC 65 44   // .b...|.oQ.,A..eD
                AC E3 CF 79 6A 19 49 C5 80 C3 FF 52 7C AC 91 1D   // ...yj.I....R|...
                9B E0 5F AD 28 47 CE F4 E7 E5 EC 87 9F C9 4B E4   // .._.(G........K.
                9E 31 C7 97 C2 B8 39 25 C4 ED F6 AA 83 FA 78 A3   // .1....9%......x.
                5A 47 C0 F4 7B 44 A8 F9 3F D1 44 A9 B7 96 BF 74   // ZG..{D..?.D....t
                9E 8D FC B3 99 82 11 52 A9 5C 7A 37 EB A3 82 B6   // .......R.\z7....
                9D A5 8B 7A 1C 87 DA 5C ED 0B 7A 72 BA B1 3F 12   // ...z...\..zr..?.
                52 C6 2F 50 DD 35 44 06 E6 F3 B0 4B AF F4 19 BD ) // R./P.5D....K....
  .hash algorithm 0x00008004
  .ver 4:0:1:0
}

I usually decompile, remove .publickey and .hash lines and then recompile.