c# - Variable scope try, finally -

this code. have try , statement. within try block have fixed statement sets pointer variable.

try {     fixed (char* chref = p)     {         //code     } } {     chref = null; } 

im struggling way set fixed pointer variable null no matter how try exits beause of scope. please help.

char* chref; try {     fixed (chref = p)     {         //code     } } {     chref = null; } 

gives me "error 12 type of local declared in fixed statement must pointer type"

were possible, you'd need ensure chref in scope. , mean putting inside fixed statement. you'd write this:

fixed (char* chref = p) {     try     {         //code     }         {         chref = null;     } } 

but not work because not allowed assign pointer chref. is, after all, fixed! if attempt assign fixed pointer compiler objects:

 error cs1656: cannot assign 'chref' because 'fixed variable' 

even if this, cannot, there no point. since chref leave scope, make no sense modify when know nothing ever observe modification.