Initial commit

Projekte/WebDesktop/WebDesktopBackend/Extentions/DirectoryInfoExtentions.cs

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+using System.IO;
+
+namespace WebDesktopBackend.Extentions {
+    public static class DirectoryInfoExtentions {
+        /// <summary>
+        /// Returns the size of the Directory (from: https://stackoverflow.com/a/32364847)
+        /// </summary>
+        /// <param name="directoryInfo">The Directory</param>
+        /// <param name="recursive">When set to true, the Functions includes also Subdirectories</param>
+        /// <returns>The size of the Directory</returns>
+        public static long GetDirectorySize(this DirectoryInfo directoryInfo, bool recursive = true) {
+            var startDirectorySize = default(long);
+            if (directoryInfo == null || !directoryInfo.Exists)
+                return startDirectorySize; //Return 0 while Directory does not exist.
+
+            //Add size of files in the Current Directory to main size.
+            foreach (var fileInfo in directoryInfo.GetFiles())
+                System.Threading.Interlocked.Add(ref startDirectorySize, fileInfo.Length);
+
+            if (recursive) //Loop on Sub Direcotries in the Current Directory and Calculate it's files size.
+                System.Threading.Tasks.Parallel.ForEach(directoryInfo.GetDirectories(), (subDirectory) =>
+                    System.Threading.Interlocked.Add(ref startDirectorySize, GetDirectorySize(subDirectory, recursive)));
+
+            return startDirectorySize;  //Return full Size of this Directory.
+        }
+    }
+}