clean up some messy GC behavior & needlessly longwinded code. slight perf cost on map save.

OpenRA.FileFormats/Exts.cs

@@ -22,6 +22,7 @@ using System;
 using System.Collections.Generic;
 using System.Reflection;
 using System.Linq;
+using System.IO;
 
 namespace OpenRA
 {
@@ -42,5 +43,22 @@ namespace OpenRA
 		{
 			return a.GetTypes().Select(t => t.Namespace).Distinct().Where(n => n != null);
 		}
+
+		public static string ReadAllText(this Stream s)
+		{
+			using (s)
+			using (var sr = new StreamReader(s))
+				return sr.ReadToEnd();
+		}
+
+		public static byte[] ReadAllBytes(this Stream s)
+		{
+			using (s)
+			{
+				var data = new byte[s.Length - s.Position];
+				s.Read(data, 0, data.Length);
+				return data;
+			}
+		}
 	}
 }

OpenRA.FileFormats/Map/Map.cs

@@ -147,8 +147,8 @@ namespace OpenRA.FileFormats
 
 		public void LoadBinaryData()
 		{
-			Stream dataStream = Package.GetContent("map.bin");
+			using (var dataStream = Package.GetContent("map.bin"))
-
+			{
 				// Load header info
 				byte version = ReadByte(dataStream);
 				var width = ReadWord(dataStream);
@@ -175,11 +175,13 @@ namespace OpenRA.FileFormats
 					for (int j = 0; j < MapSize.Y; j++)
 						MapResources[i, j] = new TileReference<byte, byte>(ReadByte(dataStream), ReadByte(dataStream));
 			}
+		}
 
 		public void SaveBinaryData(string filepath)
 		{
-			FileStream dataStream = new FileStream(filepath+".tmp", FileMode.Create, FileAccess.Write);
+			using (var dataStream = File.Create(filepath + ".tmp"))
-			BinaryWriter writer = new BinaryWriter( dataStream );
+			using (var writer = new BinaryWriter(dataStream))
+			{
 				writer.BaseStream.Seek(0, SeekOrigin.Begin);
 
 				// File header consists of a version byte, followed by 2 ushorts for width and height
@@ -202,39 +204,28 @@ namespace OpenRA.FileFormats
 						writer.Write(MapResources[i, j].type);
 						writer.Write(MapResources[i, j].index);
 					}
-			
+			}
-			writer.Flush();
-			writer.Close();
 			File.Delete(filepath);
 			File.Move(filepath + ".tmp", filepath);
 		}
 
 		public void LoadUid()
 		{
-			StreamReader uidStream = new StreamReader(Package.GetContent("map.uid"));
+			Uid = Package.GetContent("map.uid").ReadAllText();
-			Uid = uidStream.ReadLine();
-			uidStream.Close();
 		}
 
 		public void SaveUid(string filename)
 		{
 			// UID is calculated by taking an SHA1 of the yaml and binary data
 			// Read the relevant data into a buffer
-			var yamlStream = Package.GetContent("map.yaml");
+			var data = Exts.ReadAllBytes(Package.GetContent("map.yaml"))
-			var binaryStream = Package.GetContent("map.bin");
+				.Concat(Exts.ReadAllBytes(Package.GetContent("map.bin"))).ToArray();
-			var data = new byte[yamlStream.Length+binaryStream.Length];
-
-			yamlStream.Read(data,0,(int)yamlStream.Length);
-			binaryStream.Read(data,(int)yamlStream.Length,(int)binaryStream.Length);
 
 			// Take the SHA1
 			using (var csp = SHA1.Create())
 				Uid = new string(csp.ComputeHash(data).SelectMany(a => a.ToString("x2")).ToArray());
 
-			// Save to file
+			File.WriteAllText(filename, Uid);
-			StreamWriter file = new System.IO.StreamWriter(filename);
-			file.WriteLine(Uid);
-			file.Close();
 		}
 
 		public bool IsInMap(int2 xy)
@@ -263,7 +254,6 @@ namespace OpenRA.FileFormats
 			Console.WriteLine("Loaded Smudges:");
 			foreach (var s in Smudges)
 				Console.WriteLine("\t{0} {1} {2}", s.Type, s.Location, s.Depth);
-			
 		}
 	}
 }

OpenRA.FileFormats/Map/MapStub.cs

@@ -18,10 +18,9 @@
  */
 #endregion
 
+using System;
 using System.Collections.Generic;
 using System.Drawing;
-using System.IO;
-using System;
 
 namespace OpenRA.FileFormats
 {
@@ -59,9 +58,7 @@ namespace OpenRA.FileFormats
 				() => { return new Bitmap(Package.GetContent("preview.png")); }
 			);
 
-			StreamReader uidStream = new StreamReader(Package.GetContent("map.uid"));
+			Uid = Package.GetContent("map.uid").ReadAllText();
-			Uid = uidStream.ReadLine();
-			uidStream.Close();
 		}
 
 		public Rectangle PreviewBounds(Rectangle container)