Ah man, I remember I started this job as a .Net/C# Developer after being a Java Developer for close to 5 years. I specifically told them in the interview that I only had basic knowledge of .Net but I was willing to learn. Little that I knew, I was the only .Net resource on site to support this project (they purchased a product from a company located in another state with no support).
It felt like the lowest point in my career because it took me so long to get up to speed on how to contribute efficiently. I had to quickly learn Visual Studio/C#, SSRS, SSIS, TSQL, IIS practically all at once. The hardest thing that took long for me to grasp was lamba expressions, since Java didnt have this at the time.
But after a year of working there, I was finally comfortable and making consistent contributions, I learned a hell of a lot and it has helped me succeed in my role today.
That is a lot to pickup on. That would probably take me the better part of a year as well.
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