Read at most 2MB at a time from files

de4dot.code/deobfuscators/DeobUtils.cs

@@ -47,10 +47,20 @@ namespace de4dot.deobfuscators {
 			return newDef;
 		}
 
+		// If the file is on the network, and we read more than 2MB, we'll read from the wrong
+		// offset in the file! Tested: VMware 8, Win7 x64.
+		const int MAX_BYTES_READ = 0x200000;
+
 		public static byte[] readModule(ModuleDefinition module) {
 			using (var fileStream = new FileStream(module.FullyQualifiedName, FileMode.Open, FileAccess.Read, FileShare.Read)) {
 				var fileData = new byte[(int)fileStream.Length];
-				fileStream.Read(fileData, 0, fileData.Length);
+
+				int bytes, offset = 0, length = fileData.Length;
+				while ((bytes = fileStream.Read(fileData, offset, System.Math.Min(MAX_BYTES_READ, length - offset))) > 0)
+					offset += bytes;
+				if (offset != length)
+					throw new ApplicationException("Could not read all bytes");
+
 				return fileData;
 			}
 		}