"In 1996, Hejlsberg left Borland and joined Microsoft." "Since 2000, he has been the lead architect of the team developing the language C#."

http://www.wsj.com/articles/SB863034062733665000

1997: "Microsoft also offered Mr. Hejlsberg a $1.5 million signing bonus, a base salary of $150,000 to $200,000 and options for 75,000 shares of Microsoft stock. After Borland's counteroffer last October, Microsoft offered another $1.5 million bonus, the complaint says."