Dialogue in first person writing

Every writer who attempts to write a novel in the first person will find themselves backed into the "I" corner. "I" did this, or "I" did that, and then "I, I, I."..... Yes, it's tough to write in the first person, but it also has its advantages. J. D. Salinger in Catcher in the Rye wrote the novel in the first person and obviously he did okay.--uh, well maybe a little better than okay. Well, that begs the question. How did he deal with the "I" problem. I can't read Salinger's mind, if I could I'd tell you how many unpublished novels he has squirreled away. It seems to me that once a writer, always a writer, and what do writers do? Yep, they write. "Mr. Salinger, if you happen to read this blog, how about gracing us with more of your work. "
Well, back to the "I" problem. A close read of Catcher shows how Salinger used dialogue to give the various characters depth and believability.
Well, yes, dialogue works, but if it's not done properly it will kill a novel as surely as a menopausal publisher. Salinger is a master at making you think a 16 or 17 year old rogue student is speaking to you. It's the strength Catcher, in my opinion.
However, I see problems in how authentic dialogue makes to the page of a novel. The main problem is edit work, which filters out so much of the regional and sometimes the backwardness of the characters. Many time a good novel ends up being an edited limp rag so to speak.
So learn from the master, and when you write, let the authentic voice of your character give your work depth and life.
And another word to Mr. Salinger. "I'm glad you have kept your latest works from being edited to death---I can't wait to read them."