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Compiler Error CS0247 

Error Message

Cannot use a negative size with stackalloc

A negative number was passed to a stackalloc statement.

The following sample generates CS0247:

// CS0247.cs
// compile with: /unsafe
public class MyClass
{
   unsafe public static void Main()
   {
      int *p = stackalloc int [-30];   // CS0247
   }
}

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