Compiler Error CS1716


Updated: July 20, 2015

For the latest documentation on Visual Studio 2017 RC, see Visual Studio 2017 RC Documentation.

Do not use 'System.Runtime.CompilerServices.FixedBuffer' attribute. Use the 'fixed' field modifier instead.

This error arises in an unsafe code section that contains a fixed-size array declaration similar to a field declaration. Do not use this attribute. Instead, use the keyword fixed.

The following example generates CS1716.

// CS1716.cs  
// compile with: /unsafe  
using System;  
using System.Runtime.CompilerServices;  
public struct UnsafeStruct  
    [FixedBuffer(typeof(int), 4)]  // CS1716  
    unsafe public int aField;  
    // Use this single line instead of the above two lines.  
    // unsafe public fixed int aField[4];  
public class TestUnsafe  
    static int Main()  
        UnsafeStruct us = new UnsafeStruct();  
            if (us.aField[0] == 0)  
                return us.aField[1];  
                return us.aField[2];