Compiler Error CS0210

You must provide an initializer in a fixed or using statement declaration

You must declare and initialize the variable in a fixed statement. For more information, see Unsafe Code and Pointers.

The following sample generates CS0210:

// CS0210a.cs  
// compile with: /unsafe  
  
class Point  
{  
   public int x, y;  
}  
  
public class MyClass  
{  
   unsafe public static void Main()  
   {  
      Point pt = new Point();  
  
      fixed (int i)    // CS0210  
      {  
      }  
      // try the following lines instead  
      /*  
      fixed (int* p = &pt.x)  
      {  
      }  
      fixed (int* q = &pt.y)  
      {  
      }  
      */  
   }  
}  

The following sample also generates CS0210 because the using statement has no initializer.

// CS0210b.cs  
  
using System.IO;  
class Test
{  
   static void Main()
   {  
      using (StreamWriter w) // CS0210  
      // Try this line instead:  
      // using (StreamWriter w = new StreamWriter("TestFile.txt"))
      {  
         w.WriteLine("Hello there");  
      }  
   }  
}