`static readonly` vs. `const` in C#: When Should You Use Which?

C# in the choice of and static readonly: When will it be used? const

This article will discuss the differences between

and

fields in C#, and instruct you how to choose the appropriate options according to the actual situation. static readonly const

Comparison with

const static readonly The value of the statement remains unchanged during the running of the program, mainly for internal data that never change. The field can be modified during the initialization period, but it is only read. This means that is recommended for public frequency value that needs to be unarmed;

is still applicable for internal, protected or private values.

const attributes and static readonly field static readonly const

Fields provide a convenient mechanism for packaging constant value, but it is different from the attributes in some aspects. The attribute provides greater flexibility and allows operations during the SET/GET method. However,

fields are lighter and more efficient, especially when dealing with unchanged values. static readonly Suggestion

which method to choose depends on the specific needs of the application. Generally speaking, the public frequency value that requires non -variants is more suitable for using the static readonly field. static readonly It is more suitable for internal or unchanged values. If you need dynamic behavior or operation, you should consider using attributes.

Other precautions

The value is directly embedded in the executable file, which improves performance, but it also limits its modification. static readonly const On the contrary, the field allows modification during the initialization of the class, providing flexibility, but the performance decreases slightly.

The attribute provides the greatest flexibility and control, but also increases complexity and potential performance overhead.

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