Methods and properties that don’t access instance data can be static to prevent any misunderstanding about the contract of the method.

Noncompliant Code Example

public class Utilities
{
    public int MagicNum // Noncompliant
    {
        get
        {
            return 42;
        }
    }

    private static string magicWord = "please";
    public string MagicWord  // Noncompliant
    {
        get
        {
            return magicWord;
        }
        set
        {
            magicWord = value;
        }
  }

    public int Sum(int a, int b)  // Noncompliant
    {
        return a + b;
    }
}

Compliant Solution

public class Utilities
{
    public static int MagicNum
    {
        get
        {
            return 42;
        }
    }

    private static string magicWord = "please";
    public static string MagicWord
    {
        get
        {
            return magicWord;
        }
        set
        {
            magicWord = value;
        }
    }

    public static int Sum(int a, int b)
    {
        return a + b;
    }
}

Exceptions

Methods with the following names are excluded because they can’t be made static:

• Application_AuthenticateRequest
• Application_BeginRequest
• Application_End
• Application_EndRequest
• Application_Error
• Application_Init
• Application_Start
• Session_End
• Session_Start