Fix #2294: Issues discovered by static analysis.

ICSharpCode.Decompiler/CSharp/Resolver/CSharpConversions.cs

@@ -826,7 +826,6 @@ namespace ICSharpCode.Decompiler.CSharp.Resolver
 					case TypeCode.UInt16:
 						return val >= UInt16.MinValue && val <= UInt16.MaxValue;
 					case TypeCode.UInt32:
-						return val >= 0;
 					case TypeCode.UInt64:
 						return val >= 0;
 				}

ICSharpCode.Decompiler/Util/ResXResourceWriter.cs

@@ -60,7 +60,6 @@ namespace ICSharpCode.Decompiler.Util
 		public static readonly string ByteArraySerializedObjectMimeType = "application/x-microsoft.net.object.bytearray.base64";
 		public static readonly string DefaultSerializedObjectMimeType = BinSerializedObjectMimeType;
 		public static readonly string ResMimeType = "text/microsoft-resx";
-		public static readonly string ResourceSchema = schema;
 		public static readonly string SoapSerializedObjectMimeType = "application/x-microsoft.net.object.soap.base64";
 		public static readonly string Version = "2.0";
 		#endregion  // Static Fields

ILSpy.AddIn/Commands/OpenILSpyCommand.cs

@@ -1,11 +1,8 @@
 using System;
 using System.Collections.Generic;
 using System.ComponentModel.Design;
-using System.Diagnostics;
 using System.IO;
 using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
 
 using Microsoft.VisualStudio.Shell;
 
@@ -93,11 +90,16 @@ namespace ICSharpCode.ILSpy.AddIn.Commands
 			foreach (var projectReference in parentProject.ProjectReferences)
 			{
 				var roslynProject = owner.Workspace.CurrentSolution.GetProject(projectReference.ProjectId);
+				if (roslynProject != null)
+				{
 					var project = FindProject(owner.DTE.Solution.Projects.OfType<EnvDTE.Project>(), roslynProject.FilePath);
-				if (roslynProject != null && project != null)
+					if (project != null)
+					{
 						dict.Add(roslynProject.AssemblyName,
 							new DetectedReference(roslynProject.AssemblyName, Utils.GetProjectOutputAssembly(project, roslynProject), true));
 					}
+				}
+			}
 			return dict;
 		}
 

ILSpy.BamlDecompiler/BamlResourceEntryNode.cs

@@ -57,7 +57,7 @@ namespace ILSpy.BamlDecompiler
 						AvalonEditTextOutput output = new AvalonEditTextOutput();
 						try
 						{
-							if (LoadBaml(output, token))
+							LoadBaml(output, token);
 							highlighting = HighlightingManager.Instance.GetDefinitionByExtension(".xml");
 						}
 						catch (Exception ex)
@@ -71,13 +71,12 @@ namespace ILSpy.BamlDecompiler
 			return true;
 		}
 
-		bool LoadBaml(AvalonEditTextOutput output, CancellationToken cancellationToken)
+		void LoadBaml(AvalonEditTextOutput output, CancellationToken cancellationToken)
 		{
-			var asm = this.Ancestors().OfType<AssemblyTreeNode>().FirstOrDefault().LoadedAssembly;
+			var asm = this.Ancestors().OfType<AssemblyTreeNode>().First().LoadedAssembly;
 			using var data = OpenStream();
 			XDocument xamlDocument = LoadIntoDocument(asm.GetPEFileOrNull(), asm.GetAssemblyResolver(), data, cancellationToken);
 			output.Write(xamlDocument.ToString());
-			return true;
 		}
 
 		internal static XDocument LoadIntoDocument(PEFile module, IAssemblyResolver assemblyResolver,

ILSpy.BamlDecompiler/Xaml/XamlPathDeserializer.cs

@@ -174,7 +174,7 @@ namespace ILSpy.BamlDecompiler.Xaml
 						var size = ReadPoint(reader);
 						double angle = reader.ReadXamlDouble();
 
-						sb.AppendFormat(CultureInfo.InvariantCulture, "A{0} {2:R} {2} {3} {4}",
+						sb.AppendFormat(CultureInfo.InvariantCulture, "A{0} {1:R} {2} {3} {4}",
 							size, angle, largeArc ? '1' : '0', sweepDirection ? '1' : '0', pt1);
 						break;
 					}

ILSpy/Analyzers/Builtin/MethodVirtualUsedByAnalyzer.cs

@@ -17,12 +17,10 @@
 // DEALINGS IN THE SOFTWARE.
 
 using System.Collections.Generic;
-using System.ComponentModel.Composition;
 using System.Diagnostics;
 using System.Linq;
 using System.Reflection.Metadata;
 
-using ICSharpCode.Decompiler;
 using ICSharpCode.Decompiler.Disassembler;
 using ICSharpCode.Decompiler.Metadata;
 using ICSharpCode.Decompiler.TypeSystem;
@@ -134,7 +132,7 @@ namespace ICSharpCode.ILSpy.Analyzers.Builtin
 							case HandleKind.MethodSpecification:
 							case HandleKind.MemberReference:
 								var m = (mainModule.ResolveEntity(member, genericContext) as IMember)?.MemberDefinition;
-								if (m.MetadataToken == analyzedMethod.MetadataToken && m.ParentModule.PEFile == analyzedMethod.ParentModule.PEFile)
+								if (m != null && m.MetadataToken == analyzedMethod.MetadataToken && m.ParentModule.PEFile == analyzedMethod.ParentModule.PEFile)
 								{
 									return true;
 								}

ILSpy/AvalonEdit/TextMarkerService.cs

@@ -116,8 +116,7 @@ namespace ICSharpCode.ILSpy.AvalonEdit
 		internal void Redraw(ISegment segment)
 		{
 			textView.Redraw(segment, DispatcherPriority.Normal);
-			if (RedrawRequested != null)
-				RedrawRequested(this, EventArgs.Empty);
+			RedrawRequested?.Invoke(this, EventArgs.Empty);
 		}
 
 		public event EventHandler RedrawRequested;
@@ -280,8 +279,7 @@ namespace ICSharpCode.ILSpy.AvalonEdit
 
 		internal void OnDeleted()
 		{
-			if (Deleted != null)
-				Deleted(this, EventArgs.Empty);
+			Deleted?.Invoke(this, EventArgs.Empty);
 		}
 
 		void Redraw()

ILSpy/Images/Images.cs

@@ -251,7 +251,7 @@ namespace ICSharpCode.ILSpy
 						baseImage = Images.Literal;
 						break;
 					case MemberIcon.EnumValue:
-						baseImage = Images.Literal;
+						baseImage = Images.EnumValue;
 						break;
 					case MemberIcon.Property:
 						baseImage = Images.Property;

ILSpy/MainWindow.xaml.cs

@@ -783,8 +783,7 @@ namespace ICSharpCode.ILSpy
 					nd => nd.AncestorsAndSelf().OfType<AssemblyTreeNode>().Any(
 						a => oldAssemblies.Contains(a.LoadedAssembly))));
 			}
-			if (CurrentAssemblyListChanged != null)
-				CurrentAssemblyListChanged(this, e);
+			CurrentAssemblyListChanged?.Invoke(this, e);
 		}
 
 		void LoadInitialAssemblies()

ILSpy/Metadata/FlagsFilterControl.xaml.cs

@@ -1,7 +1,5 @@
 using System;
-using System.Collections.Generic;
 using System.Linq;
-using System.Reflection;
 using System.Windows;
 using System.Windows.Controls;
 
@@ -43,7 +41,10 @@ namespace ICSharpCode.ILSpy.Metadata
 			base.OnApplyTemplate();
 
 			listBox = Template.FindName("ListBox", this) as ListBox;
+			if (listBox != null)
+			{
 				listBox.ItemsSource = FlagGroup.GetFlags(FlagsType, neutralItem: "<All>");
+			}
 
 			var filter = Filter;
 

SharpTreeView/SharpTreeNodeCollection.cs

@@ -47,8 +47,7 @@ namespace ICSharpCode.TreeView
 			try
 			{
 				parent.OnChildrenChanged(e);
-				if (CollectionChanged != null)
-					CollectionChanged(this, e);
+				CollectionChanged?.Invoke(this, e);
 			}
 			finally
 			{

SharpTreeView/TreeFlattener.cs

@@ -47,8 +47,7 @@ namespace ICSharpCode.TreeView
 
 		public void RaiseCollectionChanged(NotifyCollectionChangedEventArgs e)
 		{
-			if (CollectionChanged != null)
-				CollectionChanged(this, e);
+			CollectionChanged?.Invoke(this, e);
 		}
 
 		public void NodesInserted(int index, IEnumerable<SharpTreeNode> nodes)