HomeCSharpC# Error CS1642 – Fixed size buffer fields may only be members of structs

C# Error CS1642 – Fixed size buffer fields may only be members of structs

C# Error

CS1642 – Fixed size buffer fields may only be members of structs

Reason for the Error & Solution

Fixed size buffer fields may only be members of structs.

This error occurs if you use a fixed size buffer field in a class, instead of a struct. To resolve this error, change the class to a struct or declare the field as an ordinary array.

Example

The following sample generates CS1642.

// CS1642.cs  
// compile with: /unsafe /target:library  
unsafe class C  
{  
   fixed int a[10];   // CS1642  
}  
  
unsafe struct D  
{  
    fixed int a[10];  
}  
  
unsafe class E  
{  
   public int[] a = null;  
}  

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