String.Concat Method (IEnumerable<String>)
[ This article is for Windows Phone 8 developers. If you’re developing for Windows 10, see the latest documentation. ]
Concatenates the members of a constructed IEnumerable<T> collection of type String.
Assembly: mscorlib (in mscorlib.dll)
Parameters
- values
- Type: System.Collections.Generic.IEnumerable<String>
A collection object that implements IEnumerable<T> and whose generic type argument is String.
| Exception | Condition |
|---|---|
| ArgumentNullException | values is null. |
The method concatenates each object in values; it does not add any delimiters. To specify a delimiter between each member of values, call the Join(String, IEnumerable<String>) method.
An Empty string is used in place of any null argument.
Concat(IEnumerable<String>) is a convenience method that lets you concatenate each element in an IEnumerable(Of String) collection without first converting the elements to a string array. It is particularly useful with Language-Integrated Query (LINQ) query expressions. The following example passes a List(Of String) object that contains either the uppercase or lowercase letters of the alphabet to a lambda expression that selects letters that are equal to or greater than a particular letter (which, in the example, is "M"). The IEnumerable(Of String) collection that is returned by the Enumerable.Where method is passed to the Concat(IEnumerable<String>) method to display the result as a single string.