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If Sample class has a Length property with set accessor then which of the following statements will work correctly?

Sample m = new Sample(); int l; l = m.Length;
Sample m = new Sample(); m.Length = m.Length + 20;
Sample.Length = 20;
Console.WriteLine (Sample.Length);
Sample m = new Sample(); m.Length = 10;

Correct Answer: Sample m = new Sample(); m.Length = 10;

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