How Do I Convert a C# List to a String?

Converting Lists to Strings in C#

When working with lists in C#, occasionally you may encounter the need to convert them into strings for display or data processing. This article addresses how to effectively perform this conversion.

toString() Returns Type Information

Simply invoking toString() on a List object will provide you with the type information, which is typically not the desired result. Instead, we can leverage other methods to concatenate the elements into a cohesive string.

Solution: Using String.Join()

To convert a list to a string in C#, employ the string.Join() method. This method takes two arguments: a separator and an IEnumerable collection of items to join.

string combinedString = string.Join(",", myList.ToArray());

The separator can be any string, and it will be inserted between each element in the list. You can also omit the toArray() call if your list is already of type IEnumerable.

string combinedString = string.Join(",", myList);

Reference:

String.Join(String, IEnumerable)
Concatenates the members of a constructed IEnumerable collection of type String, using the specified separator between each member.

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