Code
 1String szName = filePath; 
 2            FileStream fs = null; 
 3            BinaryReader r = null; 
 4            bool bDebug = false; 
 5
 6            try 
 7            { 
 8                fs = new FileStream(szName, FileMode.Open, FileAccess.Read); 
 9                r = new BinaryReader(fs); 
10
11                fs.Seek(0x3c, SeekOrigin.Begin); // pe heaher offset 
12                int i = r.ReadInt32(); 
13
14                fs.Seek(i + 0x18, SeekOrigin.Begin); // magic number offset 
15                int iMagicNumber = r.ReadInt16(); 
16                if(iMagicNumber == 0x010b) 
17                { 
18                    // pe32 
19                    fs.Seek(i + 0xa8, SeekOrigin.Begin);// debug data directories info offset 
20                } 
21                else if(iMagicNumber == 0x020b) 
22                { 
23                    // pe32+ 
24                    fs.Seek(i + 0xb8, SeekOrigin.Begin);// debug data directories info offset 
25                } 
26
27                else 
28                { 
29                    throw new SystemException("impossible! nnd, it is not a pe file! fk u"); 
30                } 
31
32                bDebug = r.ReadInt32() != 0; 
33            } 
34            catch(SystemException e) 
35            { 
36                Console.WriteLine(e.Message); 
37            } 
38            finally 
39            { 
40                if(fs != null) 
41                { 
42                    fs.Close(); 
43                } 
44
45                if(r != null) 
46                { 
47                    r.Close(); 
48                } 
49            }