Compiler Error CS1919


Updated: July 20, 2015

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

Unsafe type 'type name' cannot be used in object creation.

The new operator creates objects only on the managed heap. However, you can create objects in unmanaged memory indirectly by using the interoperability capabilities of the language to call native methods that return pointers.

To correct this error

  1. Use a safe type in the new object creation expression. For example, use char or int instead of char* or int*.

  2. If you must create objects in unmanaged memory, use a Win32 or COM method or else write your own function in C or C++ and call it from C#.

The following example generates CS1919 because a pointer type is unsafe:

// cs1919.cs  
// Compile with: /unsafe  
unsafe public class C  
    public static int Main()  
        var col1 = new int* { }; // CS1919  
        var col2 = new char* { }; // CS1919  
        return 1;