C# Error CS0637 – The FieldOffset attribute is not allowed on static or const fields

C# Error

CS0637 – The FieldOffset attribute is not allowed on static or const fields

Reason for the Error & Solution

The FieldOffset attribute is not allowed on static or const fields.

The attribute cannot be used on fields marked with or .

The following sample generates CS0637:

// CS0637.cs  
using System;  
using System.Runtime.InteropServices;  
  
[StructLayout(LayoutKind.Explicit)]  
public class MainClass  
{  
   [FieldOffset(3)]   // CS0637  
   public static int i;  
   public static void Main ()  
   {  
   }  
}