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編譯器錯誤 CS0212

您只能取得 fixed 陳述式初始設定式中 unfixed 運算式的位址

如需詳細資訊,請參閱 Unsafe 程式碼和指標

下列範例會示範如何取得 unfixed 運算式的位址。 下列範例會產生 CS0212。

// CS0212a.cs  
// compile with: /unsafe /target:library  
  
public class A {  
   public int iField = 5;  
  
   unsafe public void M() {
      A a = new A();  
      int* ptr = &a.iField;   // CS0212
   }  
  
   // OK  
   unsafe public void M2() {  
      A a = new A();  
      fixed (int* ptr = &a.iField) {}  
   }  
}  

下列範例也會產生 CS0212,並說明如何解決錯誤:

// CS0212b.cs  
// compile with: /unsafe /target:library  
using System;  
  
public class MyClass  
{  
   unsafe public void M()  
   {  
      // Null-terminated ASCII characters in an sbyte array
      sbyte[] sbArr1 = new sbyte[] { 0x41, 0x42, 0x43, 0x00 };  
      sbyte* pAsciiUpper = &sbArr1[0];   // CS0212  
      // To resolve this error, delete the previous line and
      // uncomment the following code:  
      // fixed (sbyte* pAsciiUpper = sbArr1)  
      // {  
      //    String szAsciiUpper = new String(pAsciiUpper);  
      // }  
   }  
}