Update sample.cs (#8740)

Author: zacharylayne

snippets/csharp/Microsoft.Win32.SafeHandles/SafeFileHandle/Overview/sample.cs

@@ -6,12 +6,10 @@
 
 class SafeHandlesExample
 {
-
     static void Main()
     {
         try
         {
-
             UnmanagedFileLoader loader = new UnmanagedFileLoader("example.xml");
         }
         catch (Exception e)
@@ -24,7 +22,6 @@ static void Main()
 
 class UnmanagedFileLoader
 {
-
     public const short FILE_ATTRIBUTE_NORMAL = 0x80;
     public const short INVALID_HANDLE_VALUE = -1;
     public const uint GENERIC_READ = 0x80000000;
@@ -36,52 +33,40 @@ class UnmanagedFileLoader
     // Use interop to call the CreateFile function.
     // For more information about CreateFile,
     // see the unmanaged MSDN reference library.
-    [DllImport("kernel32.dll", SetLastError = true, CharSet=CharSet.Unicode)]
+    [DllImport("kernel32.dll", SetLastError = true, CharSet = CharSet.Unicode)]
     static extern SafeFileHandle CreateFile(string lpFileName, uint dwDesiredAccess,
       uint dwShareMode, IntPtr lpSecurityAttributes, uint dwCreationDisposition,
       uint dwFlagsAndAttributes, IntPtr hTemplateFile);
 
     private SafeFileHandle handleValue = null;
 
-    public UnmanagedFileLoader(string Path)
-    {
-        Load(Path);
-    }
+    public UnmanagedFileLoader(string path)
+        => Load(path);
 
-    public void Load(string Path)
+    public void Load(string path)
     {
-        if (Path == null || Path.Length == 0)
-        {
-            throw new ArgumentNullException("Path");
-        }
+        if (path == null || path.Length == 0)
+            throw new ArgumentNullException(nameof(path));
 
         // Try to open the file.
-        handleValue = CreateFile(Path, GENERIC_WRITE, 0, IntPtr.Zero, OPEN_EXISTING, 0, IntPtr.Zero);
+        handleValue = CreateFile(path, GENERIC_WRITE, 0, IntPtr.Zero, OPEN_EXISTING, 0, IntPtr.Zero);
 
         // If the handle is invalid,
         // get the last Win32 error
         // and throw a Win32Exception.
         if (handleValue.IsInvalid)
-        {
             Marshal.ThrowExceptionForHR(Marshal.GetHRForLastWin32Error());
-        }
     }
 
     public SafeFileHandle Handle
     {
         get
         {
-            // If the handle is valid,
-            // return it.
             if (!handleValue.IsInvalid)
-            {
                 return handleValue;
-            }
-            else
-            {
-                return null;
-            }
+            
+            return null;
         }
     }
 }
-//</Snippet1>
+//</Snippet1>