NGWS SDK Documentation  

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Compiler Error CS1575

A stackalloc expression requires [] after type

The size of the requested allocation, with stackalloc, must be specified in square brackets.

The following sample generates CS1575:

public class MyClass {
   unsafe public static void Main() {
      int *p = stackalloc int (30);   // CS1575
      // try the following line instead
      // int *p = stackalloc int [30];
   }
}