C# generally is going to have a larger user base, more development in the future, and the tools for RAD development through Visual Studio are unbelievable.

1. The syntax will be similar to that you used in PHP and C.
2. Visual Studio with its tools and IntelliSense is extremely productive.
3. MSDN
4. Again, VS tools + Intellisense, but speed really comes from a familiarity of your language and its features.
5. VS designer for WinForms, WPF.
6. System.Threading and System.Net

C# generally is going to have a larger user base, more development in the future, and the tools for RAD development through Visual Studio are unbelievable.

1. The syntax will be similar to that you used in PHP and C.
2. Visual Studio with its tools and IntelliSense is extremely productive.
3. MSDN
4. Again, VS tools + Intellisense, but speed really comes from a familiarity of your language and its features.
5. VS designer for WinForms, WPF.
6. System.Threading and System.Net

I do not have much experience with Delphi, and I am just speaking about my experiences with C# in general. Where I work, I have extremely tight deadlines envisioned by non-programmers, and I am able to pump out line of business desktop applications extremely fast. In the last three weeks, I went from specification to deployment on two winforms LOB applications. The productivity for GUI development in C# with VS is just crazy.