C# Interview Questions and Answers (958) - Page 3

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Write a single line of code to create a text file and write contents into it.

Use following code

System.IO.File.WriteAllText(@"c:\MyTextFile.txt", "MyContents");

What is the best way to add items from an Array into ArrayList?

Use AddRange method of the ArrayList.

 string[] arr = new string[] { "ram", "shyam", "mohan" };

        ArrayList arrList = new ArrayList();

        arrList.AddRange(arr);

You pass a value-type variable into a procedure as an argument. The procedure changes the variable; however, when the procedure returns, the variable has not changed. What happened? (Choose one.)

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Which of the following is NOT Value type variable?

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You need to create a simple class or structure that contains only value types. You must create the class or structure so that it runs as efficiently as possible. You must be able to pass the class or structure to a procedure without concern that the procedure will modify it. Which of the following should you create?

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What is the correct order for Catch clauses when handling different exception types?

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Why should you close and dispose of resources in a Finally block instead of a Catch block?

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When should you use the StringBuilder class instead of the String class?

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Which of the following statements are false?

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Which of the following are not examples of built-in generic types?

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You are creating a generic class, and you need to dispose of the generic objects. How can you do this?

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Why should boxing be avoided?

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Structures inherit ToString from System.Object. Why would someone override that method within a structure?

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If there is no valid conversion between two types, what should you do when implementing the IConvertible interface?

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With strict conversions enabled, which of the following would allow an implicit conversion?

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Which are NOT acceptable ways to open a file for writing?

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Which of the following are types of changes that can be detected by the File-SystemWatcher?

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Which methods of the FileStream class doesn't affect the Position property?

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How do you not force changes in a StreamWriter to be sent to the stream it is writing to?

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Which of the following create a FileStream for writing when you want to open an existing file or create a new one if it doesn’t exist?

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