Compiler Error C2845
'operator' : pointer arithmetic not allowed on this type
You cannot increment the pointer to a managed class.
Managed Extensions for C++
You cannot increment the pointer to a __gc class. Also, string operators are only valid with /clr (not /clr:oldSyntax).
The following sample generates C2845:
// C2845b.cpp
// compile with: /clr:oldSyntax
using namespace System;
__gc class X {};
int main() {
X *pX = new X;
pX++; // C2845
String * a = new String("abc");
String * b = new String("def");
Console::WriteLine(a + b); // C2845 not with /clr:oldSyntax
}