{"action":"created","comment":{"url":"https://api.github.com/repos/ProgrammingBlockchain/ProgrammingBlockchain/pulls/comments/151295634","pull_request_review_id":76980660,"id":151295634,"diff_hunk":"@@ -116,6 +118,44 @@ Console.WriteLine(fullySigned);\n }\n \n ```  \n+Before sending the transaction to the network, examine the need of CombineSignatures() method.\n+Try to compare a full detail of transaction between bobSigned and fullySigned.\n+It will seem both are identical.\n+For this reason, it seems like the CombineSignatures() method is needless because mulit-signing has achieved without the CombineSignatures() method.\n+\n+Let's look at the case that CombineSignatures() is required:\n+\n+```cs\n+TransactionBuilder builderNew = new TransactionBuilder();\n+TransactionBuilder builderForAlice = new TransactionBuilder();\n+TransactionBuilder builderForBob = new TransactionBuilder();\n+\n+Transaction unsignedNew =\n+                builderNew\n+                    .AddCoins(coin)\n+     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