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class Class1  {
       private string str = "Class1.str";
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           str = "string being converted.";
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       static void StringConvert(Class1 c)  {
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       static void Add(int i)  {
           i++;
       }
       static void AddWithRef(ref int i)  {
           i++;
       }
       static void Main()  {
           int i1 = 10;
           int i2 = 20;
        


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