which of the following code snippets converts an ienumerable string into..., C#, .Net Technology

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Question:Which of the following code snippets converts an IEnumerable<string> into a string containing comma separated values?

A public static string ConvertToString(IEnumerable<T> source) { 
return new List<T>(source).ToArray(); 
} 
B public static string ConvertToString(IEnumerable<T> source) { 
return string.Join(",",source.ToArray());
 } 
C public static string ConvertToString(IEnumerable<T> source) { 
return source.ToString(); 
} 
D public static string ConvertToString(IEnumerable<T> source) { 
return string.Join(source.ToArray()); 
}

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Question:Which of the following code snippets converts an IEnumerable<string> into a string containing comma separated values?

A public static string ConvertToString(IEnumerable<T> source) { return new List<T>(source).ToArray(); }

B public static string ConvertToString(IEnumerable<T> source) { return string.Join(",",source.ToArray()); }

C public static string ConvertToString(IEnumerable<T> source) { return source.ToString(); }

D public static string ConvertToString(IEnumerable<T> source) { return string.Join(source.ToArray()); }

B