Use tabs, not spaces.

BuildTools/tidy.py

@@ -0,0 +1,30 @@
+import os, sys
+
+def check(filename):
+	ok = True
+	with open(filename, 'r') as f:
+		for i, line in enumerate(f):
+			if line.startswith(' '):
+				print('{}:{}: Line starting with spaces. Use tabs for indentation instead!'.format(filename, i+1))
+				ok = False
+	return ok
+
+def main():
+	root_dir = os.path.normpath(os.path.join(os.path.dirname(__file__), '..'))
+	dirs_to_check = (
+		os.path.join(root_dir, subdir)
+		for subdir in ('ICSharpCode.Decompiler', 'ILSpy', 'ILSpy.BamlDecompiler'))
+	ok = True
+	for dir in dirs_to_check:
+		for root, dirs, files in os.walk(dir):
+			if '\\obj\\' in root:
+				continue
+			for filename in files:
+				if filename.lower().endswith('.cs'):
+					if not check(os.path.join(root, filename)):
+						ok = False
+	print('Tidy check: {}'.format('successful' if ok else 'failed'))
+	return 0 if ok else 1
+
+if __name__ == '__main__':
+	sys.exit(main())

ICSharpCode.Decompiler/Ast/AstMethodBodyBuilder.cs

@@ -715,7 +715,7 @@ namespace ICSharpCode.Decompiler.Ast
 						}
 						return new StackAllocExpression {
 							Type = AstBuilder.ConvertType(type),
-                            CountExpression = arg1
+							CountExpression = arg1
 						};
 					}
 				case ILCode.Mkrefany:

ICSharpCode.Decompiler/Disassembler/MethodBodyDisassembler.cs

@@ -54,8 +54,8 @@ namespace ICSharpCode.Decompiler.Disassembler
 			output.WriteLine("// Method begins at RVA 0x{0:x4}", method.RVA);
 			output.WriteLine("// Code size {0} (0x{0:x})", body.CodeSize);
 			output.WriteLine(".maxstack {0}", body.MaxStackSize);
-            if (method.DeclaringType.Module.Assembly != null && method.DeclaringType.Module.Assembly.EntryPoint == method)
-                output.WriteLine (".entrypoint");
+			if (method.DeclaringType.Module.Assembly != null && method.DeclaringType.Module.Assembly.EntryPoint == method)
+				output.WriteLine (".entrypoint");
 			
 			if (method.Body.HasVariables) {
 				output.Write(".locals ");

ILSpy/OpenListDialog.xaml.cs

@@ -181,11 +181,11 @@ namespace ICSharpCode.ILSpy
 				manager.DeleteList(listView.SelectedItem.ToString());
 		}
 
-    private void listView_MouseDoubleClick(object sender, System.Windows.Input.MouseButtonEventArgs e)
-    {
-      if (e.ChangedButton == MouseButton.Left && listView.SelectedItem != null)
-        this.DialogResult = true;
-    }
+		private void listView_MouseDoubleClick(object sender, System.Windows.Input.MouseButtonEventArgs e)
+		{
+			if (e.ChangedButton == MouseButton.Left && listView.SelectedItem != null)
+				this.DialogResult = true;
+		}
 
 	}
 }

ILSpy/Options/DisplaySettings.cs

@@ -96,27 +96,27 @@ namespace ICSharpCode.ILSpy.Options
 			}
 		}
 
-        bool enableWordWrap;
+		bool enableWordWrap;
 
-        public bool EnableWordWrap
-        {
-            get { return enableWordWrap; }
-            set
-            {
-                if (enableWordWrap != value) {
-                    enableWordWrap = value;
-                    OnPropertyChanged("EnableWordWrap");
-                }
-            }
-        }
+		public bool EnableWordWrap
+		{
+			get { return enableWordWrap; }
+			set
+			{
+				if (enableWordWrap != value) {
+					enableWordWrap = value;
+					OnPropertyChanged("EnableWordWrap");
+				}
+			}
+		}
 
-        public void CopyValues(DisplaySettings s)
+		public void CopyValues(DisplaySettings s)
 		{
 			this.SelectedFont = s.selectedFont;
 			this.SelectedFontSize = s.selectedFontSize;
 			this.ShowLineNumbers = s.showLineNumbers;
 			this.ShowMetadataTokens = s.showMetadataTokens;
-            this.EnableWordWrap = s.enableWordWrap;
+			this.EnableWordWrap = s.enableWordWrap;
 		}
 	}
 }

ILSpy/Options/DisplaySettingsPanel.xaml.cs

@@ -117,7 +117,7 @@ namespace ICSharpCode.ILSpy.Options
 			section.SetAttributeValue("FontSize", s.SelectedFontSize);
 			section.SetAttributeValue("ShowLineNumbers", s.ShowLineNumbers);
 			section.SetAttributeValue("ShowMetadataTokens", s.ShowMetadataTokens);
-            section.SetAttributeValue("EnableWordWrap", s.EnableWordWrap);
+			section.SetAttributeValue("EnableWordWrap", s.EnableWordWrap);
 			
 			XElement existingElement = root.Element("DisplaySettings");
 			if (existingElement != null)

ILSpy/Properties/WPFAssemblyInfo.cs

@@ -7,7 +7,7 @@ using System.Windows;
 
 
 
-//In order to begin building localizable applications, set 
+//In order to begin building localizable applications, set
 //<UICulture>CultureYouAreCodingWith</UICulture> in your .csproj file
 //inside a <PropertyGroup>.  For example, if you are using US english
 //in your source files, set the <UICulture> to en-US.  Then uncomment
@@ -18,10 +18,10 @@ using System.Windows;
 
 
 [assembly: ThemeInfo(
-    ResourceDictionaryLocation.None, //where theme specific resource dictionaries are located
-    //(used if a resource is not found in the page, 
-    // or application resource dictionaries)
-    ResourceDictionaryLocation.SourceAssembly //where the generic resource dictionary is located
-    //(used if a resource is not found in the page, 
-    // app, or any theme specific resource dictionaries)
+	ResourceDictionaryLocation.None, //where theme specific resource dictionaries are located
+	//(used if a resource is not found in the page,
+	// or application resource dictionaries)
+	ResourceDictionaryLocation.SourceAssembly //where the generic resource dictionary is located
+	//(used if a resource is not found in the page,
+	// app, or any theme specific resource dictionaries)
 )]

ILSpy/TextView/DecompilerTextView.cs

@@ -97,9 +97,9 @@ namespace ICSharpCode.ILSpy.TextView
 			textEditor.TextArea.TextView.MouseDown += TextViewMouseDown;
 			textEditor.SetBinding(Control.FontFamilyProperty, new Binding { Source = DisplaySettingsPanel.CurrentDisplaySettings, Path = new PropertyPath("SelectedFont") });
 			textEditor.SetBinding(Control.FontSizeProperty, new Binding { Source = DisplaySettingsPanel.CurrentDisplaySettings, Path = new PropertyPath("SelectedFontSize") });
-            textEditor.SetBinding(TextEditor.WordWrapProperty, new Binding { Source = DisplaySettingsPanel.CurrentDisplaySettings, Path = new PropertyPath("EnableWordWrap") });
+			textEditor.SetBinding(TextEditor.WordWrapProperty, new Binding { Source = DisplaySettingsPanel.CurrentDisplaySettings, Path = new PropertyPath("EnableWordWrap") });
 
-            textMarkerService = new TextMarkerService(textEditor.TextArea.TextView);
+			textMarkerService = new TextMarkerService(textEditor.TextArea.TextView);
 			textEditor.TextArea.TextView.BackgroundRenderers.Add(textMarkerService);
 			textEditor.TextArea.TextView.LineTransformers.Add(textMarkerService);
 			textEditor.ShowLineNumbers = true;

ILSpy/TreeNodes/Analyzer/RemoveAnalyzeContextMenuEntry.cs

@@ -27,19 +27,19 @@ namespace ICSharpCode.ILSpy.TreeNodes.Analyzer
 		{
 			if (context.TreeView is AnalyzerTreeView && context.SelectedTreeNodes != null && context.SelectedTreeNodes.All(n => n.Parent.IsRoot))
 				return true;
-            return false;
+			return false;
 		}
 
 		public bool IsEnabled(TextViewContext context)
 		{
-            return true;
+			return true;
 		}
 
 		public void Execute(TextViewContext context)
 		{
-			if (context.SelectedTreeNodes != null) {                
+			if (context.SelectedTreeNodes != null) {
 				foreach (var node in context.SelectedTreeNodes) {
-                    node.Parent.Children.Remove(node);
+					node.Parent.Children.Remove(node);
 				}
 			}
 		}

ILSpy/TreeNodes/AssemblyListTreeNode.cs

@@ -130,34 +130,34 @@ namespace ICSharpCode.ILSpy.TreeNodes
 			}
 		}
 
-        #region Find*Node
+		#region Find*Node
 
-        public ILSpyTreeNode FindResourceNode(Resource resource)
-        {
-            if (resource == null)
-                return null;
-            foreach (AssemblyTreeNode node in this.Children)
-            {
-                if (node.LoadedAssembly.IsLoaded)
-                {
-                    node.EnsureLazyChildren();
-                    foreach (var item in node.Children.OfType<ResourceListTreeNode>())
-                    {
-                        var founded = item.Children.OfType<ResourceTreeNode>().Where(x => x.Resource == resource).FirstOrDefault();
-                        if (founded != null)
-                            return founded;
+		public ILSpyTreeNode FindResourceNode(Resource resource)
+		{
+			if (resource == null)
+				return null;
+			foreach (AssemblyTreeNode node in this.Children)
+			{
+				if (node.LoadedAssembly.IsLoaded)
+				{
+					node.EnsureLazyChildren();
+					foreach (var item in node.Children.OfType<ResourceListTreeNode>())
+					{
+						var founded = item.Children.OfType<ResourceTreeNode>().Where(x => x.Resource == resource).FirstOrDefault();
+						if (founded != null)
+							return founded;
 
-                        var foundedResEntry = item.Children.OfType<ResourceEntryNode>().Where(x => resource.Name.Equals(x.Text)).FirstOrDefault();
-                        if (foundedResEntry != null)
-                            return foundedResEntry;
-                    }
-                }
-            }
-            return null;
-        }
+						var foundedResEntry = item.Children.OfType<ResourceEntryNode>().Where(x => resource.Name.Equals(x.Text)).FirstOrDefault();
+						if (foundedResEntry != null)
+							return foundedResEntry;
+					}
+				}
+			}
+			return null;
+		}
 
 
-        public AssemblyTreeNode FindAssemblyNode(ModuleDefinition module)
+		public AssemblyTreeNode FindAssemblyNode(ModuleDefinition module)
 		{
 			if (module == null)
 				return null;

appveyor.yml

@@ -8,4 +8,6 @@ before_build:
 build:
   project: ILSpy.sln
   parallel: true
-  verbosity: minimal
+  verbosity: minimal
+after_test:
+- python ICSharpCode.AvalonEdit.Tests\tidy.py