diff --git a/src/SMAPI/Framework/ContentCoordinator.cs b/src/SMAPI/Framework/ContentCoordinator.cs
index d1021cad..93371415 100644
--- a/src/SMAPI/Framework/ContentCoordinator.cs
+++ b/src/SMAPI/Framework/ContentCoordinator.cs
@@ -95,7 +95,7 @@ namespace StardewModdingAPI.Framework
             this.ContentManagers.Add(
                 this.MainContentManager = new GameContentManager("Game1.content", serviceProvider, rootDirectory, currentCulture, this, monitor, reflection, this.OnDisposing, onLoadingFirstAsset)
             );
-            this.CoreAssets = new CoreAssetPropagator(this.MainContentManager.AssertAndNormalizeAssetName, reflection, monitor);
+            this.CoreAssets = new CoreAssetPropagator(this.MainContentManager.AssertAndNormalizeAssetName, reflection);
         }
 
         /// <summary>Get a new content manager which handles reading files from the game content folder with support for interception.</summary>
@@ -236,7 +236,7 @@ namespace StardewModdingAPI.Framework
                 {
                     foreach (var entry in contentManager.InvalidateCache(predicate, dispose))
                     {
-                        if (!removedAssets.TryGetValue(entry.Key, out Type type))
+                        if (!removedAssets.ContainsKey(entry.Key))
                             removedAssets[entry.Key] = entry.Value.GetType();
                     }
                 }
diff --git a/src/SMAPI/Framework/ContentPack.cs b/src/SMAPI/Framework/ContentPack.cs
index 43621141..55c1a0b2 100644
--- a/src/SMAPI/Framework/ContentPack.cs
+++ b/src/SMAPI/Framework/ContentPack.cs
@@ -1,10 +1,7 @@
 using System;
 using System.IO;
-using Microsoft.Xna.Framework.Content;
-using Microsoft.Xna.Framework.Graphics;
 using StardewModdingAPI.Toolkit.Serialization;
 using StardewModdingAPI.Toolkit.Utilities;
-using xTile;
 
 namespace StardewModdingAPI.Framework
 {
diff --git a/src/SMAPI/Framework/ModHelpers/ContentHelper.cs b/src/SMAPI/Framework/ModHelpers/ContentHelper.cs
index 80f61c13..5fd8f5e9 100644
--- a/src/SMAPI/Framework/ModHelpers/ContentHelper.cs
+++ b/src/SMAPI/Framework/ModHelpers/ContentHelper.cs
@@ -5,13 +5,10 @@ using System.Diagnostics.CodeAnalysis;
 using System.Diagnostics.Contracts;
 using System.IO;
 using System.Linq;
-using Microsoft.Xna.Framework.Content;
-using Microsoft.Xna.Framework.Graphics;
 using StardewModdingAPI.Framework.Content;
 using StardewModdingAPI.Framework.ContentManagers;
 using StardewModdingAPI.Framework.Exceptions;
 using StardewValley;
-using xTile;
 
 namespace StardewModdingAPI.Framework.ModHelpers
 {
diff --git a/src/SMAPI/Framework/ModLoading/AssemblyLoader.cs b/src/SMAPI/Framework/ModLoading/AssemblyLoader.cs
index cfe4c747..9fb5384e 100644
--- a/src/SMAPI/Framework/ModLoading/AssemblyLoader.cs
+++ b/src/SMAPI/Framework/ModLoading/AssemblyLoader.cs
@@ -409,10 +409,10 @@ namespace StardewModdingAPI.Framework.ModLoading
             if (handler.Phrases.Any())
             {
                 foreach (string message in handler.Phrases)
-                    this.Monitor.LogOnce(template.Replace("$phrase", message));
+                    this.Monitor.LogOnce(loggedMessages, template.Replace("$phrase", message));
             }
             else
-                this.Monitor.LogOnce(template.Replace("$phrase", handler.DefaultPhrase ?? handler.GetType().Name));
+                this.Monitor.LogOnce(loggedMessages, template.Replace("$phrase", handler.DefaultPhrase ?? handler.GetType().Name));
         }
 
         /// <summary>Get the correct reference to use for compatibility with the current platform.</summary>
diff --git a/src/SMAPI/Framework/ModLoading/Finders/ReferenceToMissingMemberFinder.cs b/src/SMAPI/Framework/ModLoading/Finders/ReferenceToMissingMemberFinder.cs
index 75575c97..b64a255e 100644
--- a/src/SMAPI/Framework/ModLoading/Finders/ReferenceToMissingMemberFinder.cs
+++ b/src/SMAPI/Framework/ModLoading/Finders/ReferenceToMissingMemberFinder.cs
@@ -49,7 +49,7 @@ namespace StardewModdingAPI.Framework.ModLoading.Finders
                 MethodDefinition target = methodRef.Resolve();
                 if (target == null)
                 {
-                    string phrase = null;
+                    string phrase;
                     if (this.IsProperty(methodRef))
                         phrase = $"reference to {methodRef.DeclaringType.FullName}.{methodRef.Name.Substring(4)} (no such property)";
                     else if (methodRef.Name == ".ctor")
diff --git a/src/SMAPI/Framework/Reflection/Reflector.cs b/src/SMAPI/Framework/Reflection/Reflector.cs
index d4904878..889c7ed6 100644
--- a/src/SMAPI/Framework/Reflection/Reflector.cs
+++ b/src/SMAPI/Framework/Reflection/Reflector.cs
@@ -263,7 +263,7 @@ namespace StardewModdingAPI.Framework.Reflection
                 CacheEntry entry = (CacheEntry)this.Cache[key];
                 return entry.IsValid
                     ? (TMemberInfo)entry.MemberInfo
-                    : default(TMemberInfo);
+                    : default;
             }
 
             // fetch & cache new value
diff --git a/src/SMAPI/Framework/Rendering/SXnaDisplayDevice.cs b/src/SMAPI/Framework/Rendering/SXnaDisplayDevice.cs
index 121e53bc..cb499c6b 100644
--- a/src/SMAPI/Framework/Rendering/SXnaDisplayDevice.cs
+++ b/src/SMAPI/Framework/Rendering/SXnaDisplayDevice.cs
@@ -93,17 +93,17 @@ namespace StardewModdingAPI.Framework.Rendering
         {
             if (tile == null)
                 return;
-            xTile.Dimensions.Rectangle tileImageBounds = tile.TileSheet.GetTileImageBounds(tile.TileIndex);
+            Rectangle tileImageBounds = tile.TileSheet.GetTileImageBounds(tile.TileIndex);
             Texture2D tileSheetTexture = this.m_tileSheetTextures[tile.TileSheet];
             if (tileSheetTexture.IsDisposed)
                 return;
-            this.m_tilePosition.X = (float)location.X;
-            this.m_tilePosition.Y = (float)location.Y;
+            this.m_tilePosition.X = location.X;
+            this.m_tilePosition.Y = location.Y;
             this.m_sourceRectangle.X = tileImageBounds.X;
             this.m_sourceRectangle.Y = tileImageBounds.Y;
             this.m_sourceRectangle.Width = tileImageBounds.Width;
             this.m_sourceRectangle.Height = tileImageBounds.Height;
-            this.m_spriteBatchAlpha.Draw(tileSheetTexture, this.m_tilePosition, new Microsoft.Xna.Framework.Rectangle?(this.m_sourceRectangle), this.m_modulationColour, 0.0f, Vector2.Zero, (float)Layer.zoom, SpriteEffects.None, layerDepth);
+            this.m_spriteBatchAlpha.Draw(tileSheetTexture, this.m_tilePosition, this.m_sourceRectangle, this.m_modulationColour, 0.0f, Vector2.Zero, Layer.zoom, SpriteEffects.None, layerDepth);
         }
 
         /// <summary>Finish drawing to the screen.</summary>
diff --git a/src/SMAPI/Framework/SGame.cs b/src/SMAPI/Framework/SGame.cs
index ae2c028d..6680a6c9 100644
--- a/src/SMAPI/Framework/SGame.cs
+++ b/src/SMAPI/Framework/SGame.cs
@@ -297,8 +297,6 @@ namespace StardewModdingAPI.Framework
             }
             if (Game1.currentMinigame != null)
             {
-                bool batchEnded = false;
-
                 if (events.Rendering.HasListeners())
                 {
                     Game1.spriteBatch.Begin(SpriteSortMode.Deferred, BlendState.AlphaBlend, SamplerState.PointClamp, null, null);
@@ -321,12 +319,11 @@ namespace StardewModdingAPI.Framework
                     Game1.spriteBatch.Begin(SpriteSortMode.Deferred, BlendState.AlphaBlend, SamplerState.LinearClamp, DepthStencilState.Default, RasterizerState.CullNone);
                     Game1.spriteBatch.Draw(target_screen, Vector2.Zero, target_screen.Bounds, Color.White, 0f, Vector2.Zero, Game1.options.zoomLevel, SpriteEffects.None, 1f);
                     events.Rendered.RaiseEmpty();
-                    batchEnded = true;
                     Game1.spriteBatch.End();
                 }
                 else
                 {
-                    if (!batchEnded && events.Rendered.HasListeners())
+                    if (events.Rendered.HasListeners())
                     {
                         Game1.spriteBatch.Begin(SpriteSortMode.Deferred, BlendState.AlphaBlend, SamplerState.PointClamp, null, null);
                         events.Rendered.RaiseEmpty();
diff --git a/src/SMAPI/Metadata/CoreAssetPropagator.cs b/src/SMAPI/Metadata/CoreAssetPropagator.cs
index 5c77bf66..41d10cd4 100644
--- a/src/SMAPI/Metadata/CoreAssetPropagator.cs
+++ b/src/SMAPI/Metadata/CoreAssetPropagator.cs
@@ -34,9 +34,6 @@ namespace StardewModdingAPI.Metadata
         /// <summary>Simplifies access to private game code.</summary>
         private readonly Reflector Reflection;
 
-        /// <summary>Encapsulates monitoring and logging.</summary>
-        private readonly IMonitor Monitor;
-
         /// <summary>Optimized bucket categories for batch reloading assets.</summary>
         private enum AssetBucket
         {
@@ -57,12 +54,10 @@ namespace StardewModdingAPI.Metadata
         /// <summary>Initialize the core asset data.</summary>
         /// <param name="assertAndNormalizeAssetName">Normalizes an asset key to match the cache key and assert that it's valid.</param>
         /// <param name="reflection">Simplifies access to private code.</param>
-        /// <param name="monitor">Encapsulates monitoring and logging.</param>
-        public CoreAssetPropagator(Func<string, string> assertAndNormalizeAssetName, Reflector reflection, IMonitor monitor)
+        public CoreAssetPropagator(Func<string, string> assertAndNormalizeAssetName, Reflector reflection)
         {
             this.AssertAndNormalizeAssetName = assertAndNormalizeAssetName;
             this.Reflection = reflection;
-            this.Monitor = monitor;
         }
 
         /// <summary>Reload one of the game's core assets (if applicable).</summary>
diff --git a/src/SMAPI/SButton.cs b/src/SMAPI/SButton.cs
index bc76c91d..cc412946 100644
--- a/src/SMAPI/SButton.cs
+++ b/src/SMAPI/SButton.cs
@@ -681,7 +681,7 @@ namespace StardewModdingAPI
             }
 
             // not valid
-            button = default(InputButton);
+            button = default;
             return false;
         }