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Environment Visual Studio version: 2019 Enterprise CodeMaid version: 11.1.209 Code language: C# Description I see following warning 2 or 3 times per week. Visual Studio stopped responding for 9 seconds. Disabling the extension CodeMaid m. CodeMaid provides the ability to cleanup and simp In this episode, Robert is joined by Steve Cadwallader, the author of CodeMaid, an extension for Visual Studio that has more than a million downloads.
You can visualize dependencies across your code by creating a code map. Code maps help you see how the code fits together without reading through files and lines of code.
To create and edit code maps, you need Visual Studio Enterprise edition. In Visual Studio Community and Professional editions, you can open diagrams that were generated in Enterprise edition, but you cannot edit them.
Note
Before you share maps created in Visual Studio Enterprise with others who use Visual Studio Professional, make sure that all the items on the map (such as hidden items, expanded groups, and cross-group links) are visible.
You can map dependencies for code in these languages:
Visual C# or Visual Basic in a solution or assemblies (.dll or .exe)
Native or managed C or C++ code in Visual C++ projects, header files (.h or
#include
), or binariesX++ projects and assemblies made from .NET modules for Microsoft Dynamics AX
Note
For projects other than C# or Visual Basic, there are fewer options for starting a code map or adding items to an existing code map. For example, you cannot right-click an object in the text editor of a C++ project and add it to a code map. However, you can drag and drop individual code elements or files from Solution Explorer, Class View, and Object Browser.
Install Code Map and Live Dependency Validation
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To create a code map in Visual Studio, first install the Code Map and Live Dependency Validation components:
Open Visual Studio Installer. You can open it from the Windows Start menu, or within Visual Studio by selecting Tools > Get Tools and Features.
Select the Individual components tab.
Scroll down to the Code tools section and select Code Map and Live Dependency Validation.
Select Modify.
The Code Map and Live Dependency Validation components begin installing. You may be asked to close Visual Studio.
Add a code map
You can create an empty code map and drag items onto it, including assembly references, files and folders, or you can generate a code map for all or part of your solution.
To add an empty code map:
In Solution Explorer, open the shortcut menu for your top-level solution node. Choose Add > New Item.
In the Add New Item dialog, under Installed, choose the General category.
Choose the Directed Graph Document(.dgml) template and then select Add.
Tip
This template may not appear alphabetically, so scroll down to the bottom of the template list if you don't see it.
A blank map appears in your solution's Solution Items folder.
Similarly, you can create a new code map file without adding it to your solution by selecting Architecture > New Code Map or File > New > File.
Generate a code map for your solution
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To see all the dependencies in your solution:
On the menu bar, choose Architecture > Generate Code Map for Solution. If your code hasn't changed since the last time you built it, you can select Architecture > Generate Code Map for Solution Without Building instead.
A map is generated that shows the top-level assemblies and aggregated links between them. The wider the aggregate link, the more dependencies it represents.
Use the Legend button on the code map toolbar to show or hide the list of project type icons (such as Test, Web, and Phone Project), code items (such as Classes, Methods, and Properties), and relation types (such as Inherits From, Implements, and Calls).
This example solution contains Solution Folders (Tests and Components), Test Projects, Web Projects, and assemblies. By default, all containment relationships appear as groups, which you can expand and collapse. The Externals group contains anything outside your solution, including platform dependencies. External assemblies show only those items that are used. By default, system base types are hidden on the map to reduce clutter.
To drill down into the map, expand the groups that represent projects and assemblies. You can expand everything by pressing CTRL+A to select all the nodes and then choosing Group, Expand from the shortcut menu.
However, this may not be useful for a large solution. In fact, for complex solutions, memory limitations may prevent you from expanding all the groups. Instead, to see inside an individual node, expand it. Move your mouse pointer on top of the node and then click the chevron (down arrow) when it appears.
Or use the keyboard by selecting the item then pressing the plus key (+). To explore deeper levels of code, do the same for namespaces, types, and members.
Tip
For more details about working with code maps using the mouse, keyboard, and touch, see Browse and rearrange code maps.
To simplify the map and focus on individual parts, choose Filters on the code map toolbar and select just the types of nodes and links you are interested in. For example, you can hide all the Solution Folder and Assembly containers.
You can also simplify the map by hiding or removing individual groups and items from the map, without affecting the underlying solution code.
To see the relationships between items, select them in the map. The colors of the links indicate the types of relationship, as shown in the Legend pane.
In this example, the purple links are calls, the dotted links are references, and the light blue links are field access. Green links can be inheritance, or they may be aggregate links that indicate more than one type of relationship (or category).
Tip
If you see a green link, it might not mean there's just an inheritance relationship. There might also be method calls, but these are hidden by the inheritance relationship. To see specific types of links, use the checkboxes in the Filters pane to hide the types you aren't interested in.
To get more information about an item or link, move the pointer on top of it until a tooltip appears. This shows details of a code element or the categories that a link represents.
To examine items and dependencies represented by an aggregate link, first select the link and then open its shortcut menu. Choose Show Contributing Links (or Show Contributing Links on New Code Map). This expands the groups at both ends of the link and shows only those items and dependencies that participate in the link.
To focus in on specific parts of the map, you can continue to remove items you aren't interested in. For example, to drill into class and member view, simply filter all the namespace nodes in the Filters pane.
Another way to focus in on a complex solution map is to generate a new map containing selected items from an existing map. Hold Ctrl while selecting the items you want to focus on, open the shortcut menu, and choose New Graph from Selection.
The containing context is carried over to the new map. Hide Solution Folders and any other containers you don't want to see using the Filters pane.
Expand the groups and select items in the map to view the relationships.
Also see:
- Find potential problems in your code by running an analyzer
View specific dependencies in a code map
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Suppose you have a code review to perform in some files with pending changes. To see the dependencies in those changes, you can create a code map from those files.
In Solution Explorer, select the projects, assembly references, folders, files, types, or members that you want to map.
On the Solution Explorer toolbar, choose Show on Code Map . Or, open the shortcut menu for one or a group of items and choose Show on Code Map.
You can also drag items from Solution Explorer, Class View, or Object Browser, into a new or existing code map. To include the parent hierarchy for your items, press and hold the Ctrl key while you drag items, or use the Include Parents button on the code map toolbar to specify the default action. You can also drag assembly files from outside Visual Studio, such as from Windows Explorer.
Note
When you add items from a project that's shared across multiple apps, like Windows Phone or Microsoft Store, those items appear on the map with the currently active app project. If you change context to another app project and add more items from the shared project, those items now appear with the newly active app project. Operations that you perform with an item on the map apply only to those items that share the same context.
The map shows the selected items within their containing assemblies.
To explore items, expand them. Move the mouse pointer on top of an item, then click the chevron (down arrow) icon when it appears.
To expand all items, select them using Ctrl+A, then open the shortcut menu for the map and choose Group > Expand. However, this option isn't available if expanding all groups creates an unusable map or memory issues.
Continue to expand items you are interested in, right down to the class and member level if necessary.
To see members that are in the code but don't appear on the map, click the Refetch Children icon in the top left corner of a group.
To see more items related to those on the map, select one and choose Show Related on the code map toolbar, then select the type of related items to add to the map. Alternatively, select one or more items, open the shortcut menu, and then choose the Show option for the type of related items to add to the map. For example:
For an assembly, choose:
Option Description Show Assemblies This References Add assemblies that this assembly references. External assemblies appear in the Externals group. Show Assemblies Referencing This Add assemblies in the solution that reference this assembly. For a namespace, choose Show Containing Assembly, if it's not visible.
For a class or interface, choose:
Option Description Show Base Types For a class, add the base class and the implemented interfaces.
For an interface, add the base interfaces.Show Derived Types For a class, add the derived classes.
For an interface, add the derived interfaces and the implementing classes or structs.Show Types This References Add all classes and their members that this class uses. Show Types Referencing This Add all classes and their members that use this class. Show Containing Namespace Add the parent namespace. Show Containing Namespace and Assembly Add the parent container hierarchy. Show All Base Types Add the base class or interface hierarchy recursively. Show All Derived Types For a class, add all the derived classes recursively.
For an interface, add all the derived interfaces and implementing classes or structs recursively.For a method, choose:
Option Description Show Methods This Calls Add methods that this method calls. Show Fields This References Add fields that this method references. Show Containing Type Add the parent type. Show Containing Type, Namespace, and Assembly Add the parent container hierarchy. Show Overridden Methods For a method that overrides other methods or implements an interface's method, add all the abstract or virtual methods in base classes that are overridden and, if any, the interface's method that is implemented. For a field or property, choose:
Option Description Show Containing Type Add the parent type. Show Containing Type, Namespace, and Assembly Add the parent container hierarchy. The map shows the relationships. In this example, the map shows the methods called by the
Find
method and their location in the solution or externally.To simplify the map and focus on individual parts, choose Filters on the code map toolbar and select just the types of nodes and links you are interested in. For example, turn off display of Solution Folders, Assemblies, and Namespaces.