Static Readonly vs. Const in C#: When Should I Use Which for Constant Values?

The best practice of Static ReadOnly and Const in the c#: Selection Guide of the constant value

When processing the constant value in class C#, understanding the difference between

field and

values ​​is very important, especially when considering public visibility. static readonly const Recommended method of public fields

For public fields that indicate constant values, modifiers are recommended. This method ensures that fields are unchanged, and their values ​​cannot be covered by class or practical examples. By maintaining non -degeneration, this ensures the reliability and consistency of the constant value in the system.

The reason for the internal/protected/private value static readonly

Different from public fields, the constant values ​​used in internal, protected or private access can be used by modifiers. This allows the value to directly connect to the code of the caller, which may improve performance. However, please note that modifying the value requires re -compilation of dependent clients, and the field does not have this limit.

The consideration of the static attributes const const static readonly Although fields are widely used for public frequency value, another method is to use public static attributes with only GET accessors. These attributes can use private fields as backing, which allows greater flexibility and potential runtime to retrieve.

Summary

In the end, the appropriate selection between field and

values ​​depends on the visibility and requirements of the constant value. For public fields, it is recommended to use to ensure invariance and stability. Internal/protected/private values ​​benefit from the performance advantage of static readonly. Combined with the use of static attributes and private static readonly fields, a hybrid solution is provided to achieve flexibility and value acquisition during runtime. Considering these factors, developers can effectively manage and represent the constant values ​​in their code libraries.

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