Methods for distributing value among classes in a program

Question

I use

Environment.GetFolderPath(Environment.SpecialFolder.CommonApplicationData) + "\MyProgram"

As a way to store multiple files used by my program. I would like to avoid pasting the same piece of code throughout my application.

I need to make sure that:

• The path cannot be accidentally changed after installation
• The classes he needs have access to him.

I thought:

• Make him single
• Using constructor dependency injection
• Using Property Dependency Injection
• Using AOP to create a path where necessary.

Each has its pros and cons.

Singleton is all his favorite boys. I am not against using one, but there are good reasons to avoid it, if possible.

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Answer 1

IMyAppConfig, .

Answer 2

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MyAppEnvironment.ApplicationFolder

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Answer 3

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public static class GlobalSettings {
  private static string s_path;
  public static string Path { get { return s_path; } }
  public static void UpdatePath(string path) {
    if ( s_path != null || path == null ) { throw ... }
    s_path = path;
  }
}

Answer 4

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Answer 5

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And classes can be transferred to a new project, regardless of this particular detail.