c# - c# 'string' to 'System.Collections.Generic.IEnumerable'

Question

I do not understand, what is the problem?

my code:

public List<string> files = new List<string>();
string bb="C:\\cpqsystem";
files.AddRange(bb);

error description:

error CS1502: The best overloaded method match for 'System.Collections.Generic.List<string>.AddRange(System.Collections.Generic.IEnumerable<string>)' has some invalid arguments
error CS1503: Argument 1: cannot convert from 'string' to 'System.Collections.Generic.IEnumerable<string>'

Answer 1

bb is just one string, not a collection of them (it's a collection of chars), so you just want to use Add (i.e. files.Add(bb)).

Answer 2

As specified before you should use Add for a single string.

If you actually want to use AddRange you should create an IEnumerable<string> with your string (for example an array):

files.AddRange(new[]{bb});

Answer 3

The AddRange() function expects an IEnumerable<T> collection as its argument ( hence the error cannot convert from 'string' to 'System.Collections.Generic.IEnumerable<string>' ) and adds the collection to the end of the specified List<T>. Since you are trying to add a single string, you should use the Add() function :

files.Add(bb);

Answer 4

AddRange adds a collection of entries to a list, so it's expecting an IEnumerable. You're only supplying a single string, so you should use the Add method.

Try

files.Add(bb);

Answer 5

To add a String in a List of Strings with addrange you need to have an IEnumerable<string>.

To add a single string to a List of Strings, you have to write in this way:

public List<string> files = new List<string>();
string bb="C:\\cpqsystem";
files.Add(bb);