The best overloaded method match for 'string.Join(string, string[])' has some invalid arguments

Question

I want to extract come text between two tags. The \"txtReadfile\" contains many tags. I want to extract all the text in each occurrence of the tag.

I used the following

Answer 1

Before .NET 4, the String.Join method only had overloads that took arrays as their second parameter. Support for IEnumerable was only introduced in .NET 4.0.

// From .NET 2.0:
Join(String, String[])
Join(String, String[], Int32, Int32)
Join(String, Object[])

// From .NET 4.0:
Join(String, IEnumerable)
Join(String, IEnumerable)

Thus, if you're targeting an earlier framework, you need to call ToArray on your list to convert it into string[]:

string output= string.Join(" ", destList.ToArray());