Passing ch3br in agcn

when one passes methyl bromide in alcoholic compound silver cyanide, the results special compared to the reaction of other methyls.Therefore this question studies what happens when ch3br is passed in agcn.silver cyanide is a poisonous compound AgCN or Agx(CN)x that is obtained as a white curdy precipitate when a soluble cyanide is added to aqueous solutions of a silver salt and that readily forms complex cyanides