Fix CA1052

OpenRA.Game/Map/TerrainInfo.cs

@@ -69,7 +69,7 @@ namespace OpenRA
 
 	// HACK: Temporary placeholder to avoid having to change all the traits that reference this constant.
 	// This can be removed after the palette references have been moved from traits to sequences.
-	public class TileSet
+	public static class TileSet
 	{
 		public const string TerrainPaletteInternalName = "terrain";
 	}

OpenRA.Game/Network/GeoIP.cs

@@ -19,7 +19,7 @@ using ICSharpCode.SharpZipLib.Zip;
 
 namespace OpenRA.Network
 {
-	public class GeoIP
+	public static class GeoIP
 	{
 		sealed class IP2LocationReader
 		{

OpenRA.Game/Network/Nat.cs

@@ -17,7 +17,7 @@ namespace OpenRA.Network
 {
 	public enum NatStatus { Enabled, Disabled, NotSupported }
 
-	public class Nat
+	public static class Nat
 	{
 		public static NatStatus Status => NatUtility.IsSearching ? natDevice != null ? NatStatus.Enabled : NatStatus.NotSupported : NatStatus.Disabled;
 

OpenRA.Game/Support/HttpClientFactory.cs

@@ -14,7 +14,7 @@ using System.Net.Http;
 
 namespace OpenRA.Support
 {
-	public class HttpClientFactory
+	public static class HttpClientFactory
 	{
 #if NET5_0_OR_GREATER
 		const int MaxConnectionPerServer = 20;