• S-prefixed C3921
• C2143 using with /clr
  

Compiler Error C3921

• Error Message Use of S-prefixed strings requires /clr:oldSyntax command line option
• In Visual C++ 2005, you no longer need to explicitly specify that a string is a CLR string.

Takeout "S"

Compiler Error C2143

• C2143: syntax error : missing ';' before '.'
• C2873: 'System' : symbol cannot be used in a using-declation

// C2143a.cpp
// compile with: /clr /c
using System.Reflection;   // C2143 // C2873
using namespace System::Reflection;