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);
// }
}
}