How Many Ways Can I Initialize an Array in C#?

C#array initialized multiple methods

Arrays are important data structures for storing sets of the same type value. C# offers a variety of array initialization syntax, providing developers with flexibility and convenience.

The most direct method is to use

New keywords, followed by array type and required size:

<code class="language-csharp">string[] array = new string[2]; // 创建长度为 2 的数组，初始化为默认值</code>

or, you can use the specific value of the bracket syntax to initialize the array during the creation period:

<code class="language-csharp">string[] array = new string[] { "A", "B" }; // 创建长度为 2 的数组，初始化为 "A" 和 "B"</code>

You can also list the value only in parentheses, without using

New Keywords:

<code class="language-csharp">string[] array = { "A", "B" }; // 创建长度为 2 的数组，初始化为 "A" 和 "B"</code>

In addition, you can use

VAR to infer the type of array from the initial grammar:

<code class="language-csharp">var array = new[] { "A", "B" }; // 创建长度为 2 的已填充数组，类型从值推断</code>

Finally, C# 12 introduces a collection expression, allowing simple array initialization without the need to specify the type:

<code class="language-csharp">string[] array = ["A", "B"]; // 创建长度为 2 的已填充数组，类型从值推断</code>

It should be noted that the initialization array of parentheses grammar cannot be used to determine the type of array. In this case, the type must be displayed before the parentheses.

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