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);

What is the result of the following code ? interface IFoo1 { void meth1(); } interface IFoo2 { void meth1(); } public class f : IFoo1, IFoo2 { void IFoo1.meth1() { Console.WriteLine("Hi1"); } void IFoo2.meth1() { Console.WriteLine("Hi2"); } public void meth1() { Console.WriteLine('Hi3'); } void Main() { IFoo1 f1 = new f(); IFoo2 f2 = new f(); f f3 = new f(); f1.meth1(); f2.meth1(); f3.meth1(); }

Which C# statement is equivalent to this: int myInt = new int(); ?

Which keyword would be used in the class definition if we did not want to create an instance of that class?

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

What is Semaphore?

A generic type with arguments provided, like KeyValuePair, is called?

Which of the following statements are correct about a HashTable collection? (Choose all that apply)

Which is the correct way to enumerate an Enum in C#?