How Can I Assign Initial Values to C# Auto-Properties?

The initial value assignment method of the automatic attribute of the automatic attribute

C #'s automatic attribute provides a simple syntax to define the attributes with automatic Getter and Setter. However, the assignment of automatic attributes needs to be traditionally used to use a constructor or restore the old attribute grammar.

Traditional methods

Construct function initialization:

Initialize automatic properties in the constructor to ensure that it is valuable when the object is created.

Old attribute grammar:

The use of complete attribute grammar allows the initial value of the value in the Getter and Setter method.

<code class="language-csharp">class Person
{
    public Person()
    {
        Name = "初始名称";
    }

    public string Name { get; set; }
}</code>

• C# 6.0's inner joint initialization device

In C# 6.0 and higher versions, a simpler method can be used to assign the initial value of the automatic attribute. This grammar allows the initial value in the inner coupling:

<code class="language-csharp">private string name = "初始名称";

public string Name 
{
    get 
    {
        return name;
    }
    set
    {
        name = value;
    }
}</code>

DefaultValueAttribute's limitations

DefaultValueAttribute is mainly used for Visual Studio designer to specify the default value displayed in the IDE. It does not affect the generated IL, nor is it used to initialize the attribute during runtime.

<code class="language-csharp">public int X { get; set; } = x; // C# 6 或更高版本</code>

In short, the inner United initialization of the inner United initializer introduced in C# 6.0 provides a direct and concise method to assign the initial value of the automatic attribute, avoiding the need to manually initialize or use the old attribute syntax in the constructor.

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