diff --git a/OpenRA.Game/Platform.cs b/OpenRA.Game/Platform.cs
index e71ae16829..01288879e3 100644
--- a/OpenRA.Game/Platform.cs
+++ b/OpenRA.Game/Platform.cs
@@ -160,7 +160,7 @@ namespace OpenRA
 		/// <summary>Replace special character prefixes with full paths.</summary>
 		public static string ResolvePath(params string[] path)
 		{
-			return ResolvePath(path.Aggregate(Path.Combine));
+			return ResolvePath(Path.Combine(path));
 		}
 
 		/// <summary>
diff --git a/OpenRA.Mods.Cnc/FileFormats/XccLocalDatabase.cs b/OpenRA.Mods.Cnc/FileFormats/XccLocalDatabase.cs
index 39c5d20572..7658187973 100644
--- a/OpenRA.Mods.Cnc/FileFormats/XccLocalDatabase.cs
+++ b/OpenRA.Mods.Cnc/FileFormats/XccLocalDatabase.cs
@@ -51,7 +51,7 @@ namespace OpenRA.Mods.Cnc.FileFormats
 				writer.Write(Encoding.ASCII.GetBytes("XCC by Olaf van der Spek"));
 				writer.Write(new byte[] { 0x1A, 0x04, 0x17, 0x27, 0x10, 0x19, 0x80, 0x00 });
 
-				writer.Write(Entries.Aggregate(Entries.Length, (a, b) => a + b.Length) + 52); // Size
+				writer.Write(Entries.Sum(e => e.Length) + Entries.Length + 52); // Size
 				writer.Write(0); // Type
 				writer.Write(0); // Version
 				writer.Write(0); // Game/Format (0 == TD)
diff --git a/OpenRA.Mods.Cnc/UtilityCommands/ImportTSMapCommand.cs b/OpenRA.Mods.Cnc/UtilityCommands/ImportTSMapCommand.cs
index b0c3f9788c..f719453184 100644
--- a/OpenRA.Mods.Cnc/UtilityCommands/ImportTSMapCommand.cs
+++ b/OpenRA.Mods.Cnc/UtilityCommands/ImportTSMapCommand.cs
@@ -313,7 +313,7 @@ namespace OpenRA.Mods.Cnc.UtilityCommands
 			var tileset = Game.ModData.DefaultTileSets[map.Tileset];
 			var mapSection = file.GetSection("IsoMapPack5");
 
-			var data = Convert.FromBase64String(mapSection.Aggregate(string.Empty, (a, b) => a + b.Value));
+			var data = Convert.FromBase64String(string.Concat(mapSection.Select(kvp => kvp.Value)));
 			int cells = (fullSize.X * 2 - 1) * fullSize.Y;
 			int lzoPackSize = cells * 11 + 4; // last 4 bytes contains a lzo pack header saying no more data is left
 			var isoMapPack = new byte[lzoPackSize];
@@ -349,13 +349,13 @@ namespace OpenRA.Mods.Cnc.UtilityCommands
 		static void ReadOverlay(Map map, IniFile file, int2 fullSize)
 		{
 			var overlaySection = file.GetSection("OverlayPack");
-			var overlayCompressed = Convert.FromBase64String(overlaySection.Aggregate(string.Empty, (a, b) => a + b.Value));
+			var overlayCompressed = Convert.FromBase64String(string.Concat(overlaySection.Select(kvp => kvp.Value)));
 			var overlayPack = new byte[1 << 18];
 			var temp = new byte[1 << 18];
 			UnpackLCW(overlayCompressed, overlayPack, temp);
 
 			var overlayDataSection = file.GetSection("OverlayDataPack");
-			var overlayDataCompressed = Convert.FromBase64String(overlayDataSection.Aggregate(string.Empty, (a, b) => a + b.Value));
+			var overlayDataCompressed = Convert.FromBase64String(string.Concat(overlayDataSection.Select(kvp => kvp.Value)));
 			var overlayDataPack = new byte[1 << 18];
 			UnpackLCW(overlayDataCompressed, overlayDataPack, temp);
 
diff --git a/OpenRA.Mods.Common/Traits/Power/Player/PowerManager.cs b/OpenRA.Mods.Common/Traits/Power/Player/PowerManager.cs
index 7f71afd0b2..e9a322037c 100644
--- a/OpenRA.Mods.Common/Traits/Power/Player/PowerManager.cs
+++ b/OpenRA.Mods.Common/Traits/Power/Player/PowerManager.cs
@@ -70,7 +70,7 @@ namespace OpenRA.Mods.Common.Traits
 		{
 			int old;
 			powerDrain.TryGetValue(a, out old); // old is 0 if a is not in powerDrain
-			var amount = a.TraitsImplementing<Power>().Where(t => !t.IsTraitDisabled).Aggregate(0, (v, p) => v + p.GetEnabledPower());
+			var amount = a.TraitsImplementing<Power>().Where(t => !t.IsTraitDisabled).Sum(p => p.GetEnabledPower());
 			powerDrain[a] = amount;
 			if (amount == old || devMode.UnlimitedPower)
 				return;