1 // This code must be compilable without any warning
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2 // Compiler options: -warnaserror -warn:4
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8 public abstract class aClass
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10 public static implicit operator aClass(fromClass o)
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16 public class realClass1 : aClass
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18 public static implicit operator realClass1(fromClass o)
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24 public class fromClass
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26 static void Main () {}
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