What does the following statement do? #error Type Mismatch

What is the name of the open source C# compiler released by Microsoft?

In the following statement: string[] words = text.Split(delimiterChars); what is the function of delimiterChars?

What is the purpose of the [STAThread] attribute?

Consider the following statement: string str = 'abcdefg';. How would get the length of str?

What description BEST suits the code below. var Dictionary = new Dictionary<string, int>(StringComparer.OrdinalIgnoreCase);

Among the given collections which one is I/O index based? (Choose all that apply).

Among the given collections which one is I/O index based? (Check all that apply)

Which of the following constitute the .Net framework?

Which of the following keywords is used to manually throw an exception handling?

What is Semaphore?