C# declare empty string array

Question

I need to declare an empty string array and i'm using this code

string[] arr = new String[0]();

But I get "method name expected" error.

What's wrong?

Answer 1

// zero-element array
var arr0 = System.Array.Empty<string>(); // Recommended: https://learn.microsoft.com/en-us/dotnet/fundamentals/code-analysis/quality-rules/ca1825
var arr1 = new string[0];

// 5-Elements array with null values
var arr2 = new string[5];

// 5-Elements array with empty string values
var arr3 = System.Linq.Enumerable.Repeat(string.Empty, 5).ToArray();
var arr4 = System.Linq.Enumerable.Range(0, 5).Select(_ => string.Empty).ToArray();

Answer 2

could get something like this with: private List list = new List(); string[] dnormlines kist.ToArray();

Answer 3

If you are using .NET Framework 4.6 and later, they have some new syntax you can use:

using System;  // To pick up definition of the Array class.

var myArray = Array.Empty<string>();

Answer 4

Your syntax is invalid.

string[] arr = new string[5];

That will create arr, a referenced array of strings, where all elements of this array are null. (Since strings are reference types)

This array contains the elements from arr[0] to arr[4]. The new operator is used to create the array and initialize the array elements to their default values. In this example, all the array elements are initialized to null.

Single-Dimensional Arrays (C# Programming Guide)

Answer 5

The following should work fine.

string[] arr = new string[] {""};

Answer 6

Try this

string[] arr = new string[] {};

Answer 7

Those curly things are sometimes hard to remember, that's why there's excellent documentation:

// Declare a single-dimensional array  
int[] array1 = new int[5];

Answer 8

Your syntax is wrong:

string[] arr = new string[]{};

or

string[] arr = new string[0];

Answer 9

If you must create an empty array you can do this:

string[] arr = new string[0];

If you don't know about the size then You may also use List<string> as well like

var valStrings = new List<string>();

// do stuff...

string[] arrStrings = valStrings.ToArray();

Answer 10

Arrays' constructors are different. Here are some ways to make an empty string array:

var arr = new string[0];
var arr = new string[]{};
var arr = Enumerable.Empty<string>().ToArray()

(sorry, on mobile)

Answer 11

You can try this

string[] arr = {};