diff --git a/.editorconfig b/.editorconfig
index 5e6d3f6649..09d93dcfed 100644
--- a/.editorconfig
+++ b/.editorconfig
@@ -63,7 +63,7 @@ dotnet_diagnostic.IDE0044.severity = warning
 
 # IDE0062 Make local function static
 #csharp_prefer_static_local_function = true
-dotnet_diagnostic.IDE0062.severity = silent # Requires C# 8 - TODO Consider enabling
+dotnet_diagnostic.IDE0062.severity = warning
 
 # IDE0064 Make struct fields writable
 # No options
diff --git a/OpenRA.Game/GameRules/ActorInfo.cs b/OpenRA.Game/GameRules/ActorInfo.cs
index bd3c379e21..41d34fb36f 100644
--- a/OpenRA.Game/GameRules/ActorInfo.cs
+++ b/OpenRA.Game/GameRules/ActorInfo.cs
@@ -118,7 +118,7 @@ namespace OpenRA
 			var unresolved = source.ToHashSet();
 			unresolved.ExceptWith(resolved);
 
-			bool AreResolvable(Type a, Type b) => a.IsAssignableFrom(b);
+			static bool AreResolvable(Type a, Type b) => a.IsAssignableFrom(b);
 
 			// This query detects which unresolved traits can be immediately resolved as all their direct dependencies are met.
 			var more = unresolved.Where(u =>
diff --git a/OpenRA.Mods.Cnc/Traits/World/TSShroudPalette.cs b/OpenRA.Mods.Cnc/Traits/World/TSShroudPalette.cs
index 0c3592479b..fd399a71f3 100644
--- a/OpenRA.Mods.Cnc/Traits/World/TSShroudPalette.cs
+++ b/OpenRA.Mods.Cnc/Traits/World/TSShroudPalette.cs
@@ -37,7 +37,7 @@ namespace OpenRA.Mods.Cnc.Traits
 
 		public void LoadPalettes(WorldRenderer wr)
 		{
-			uint MakeColor(int i)
+			static uint MakeColor(int i)
 			{
 				if (i < 128)
 					return (uint)(int2.Lerp(255, 0, i, 127) << 24);
diff --git a/OpenRA.Mods.Common/Pathfinder/HierarchicalPathFinder.cs b/OpenRA.Mods.Common/Pathfinder/HierarchicalPathFinder.cs
index 416d54d7ea..d794f674a9 100644
--- a/OpenRA.Mods.Common/Pathfinder/HierarchicalPathFinder.cs
+++ b/OpenRA.Mods.Common/Pathfinder/HierarchicalPathFinder.cs
@@ -307,7 +307,7 @@ namespace OpenRA.Mods.Common.Pathfinder
 		/// </summary>
 		void BuildGrids()
 		{
-			Grid GetCPosBounds(Map map)
+			static Grid GetCPosBounds(Map map)
 			{
 				if (map.Grid.Type == MapGridType.RectangularIsometric)
 				{
@@ -369,7 +369,7 @@ namespace OpenRA.Mods.Common.Pathfinder
 					}
 				}
 
-				CPos AbstractCellForLocalCells(List<CPos> cells, byte layer)
+				static CPos AbstractCellForLocalCells(List<CPos> cells, byte layer)
 				{
 					var minX = int.MaxValue;
 					var minY = int.MaxValue;
diff --git a/OpenRA.Mods.Common/Widgets/Logic/ServerListLogic.cs b/OpenRA.Mods.Common/Widgets/Logic/ServerListLogic.cs
index c7a7f3a428..119bdeb5fe 100644
--- a/OpenRA.Mods.Common/Widgets/Logic/ServerListLogic.cs
+++ b/OpenRA.Mods.Common/Widgets/Logic/ServerListLogic.cs
@@ -692,7 +692,7 @@ namespace OpenRA.Mods.Common.Widgets.Logic
 				header.Get<LabelWidget>("LABEL").GetText = () => headerTitle;
 				rows.Add(header);
 
-				int ListOrder(GameServer g)
+				static int ListOrder(GameServer g)
 				{
 					// Servers waiting for players are always first
 					if (g.State == (int)ServerState.WaitingPlayers && g.Players > 0)