About collapsing code block in Visual Studio using #pragma region

Question

In VisualStudio, when you write a function it can collapse to outlines, everyone knows it. Also you can use #pragma region and #pragma endregion to manually specify a code region so that it can collapse. However I found a problem that, if any collapsed code blocks are within the #pragma region, they cannot collapse anymore. Is there any way to solve it?

Solution

There are several other also better and flexible ways than #pragma region you can do to collapse code in VS:

Method 1: Use {...} instead which natively supports code collapsing in VS.

1. Enable option: Tools->Text Editor->C/C++->Formatting->OutLine Statement Blocks->True.

2. Put your in different scopes {...}, then it will collapse the code in different scopes:

   

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Method 2: use keyboard shortcuts to collapse code you want:

• CTRL + M + O will collapse all.

• CTRL + M + L will expand all.

• CTRL + M + P will expand all and disable outlining.

• CTRL + M + M will collapse/expand the current section.

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It is worthy noting that method #1 works better for plain code snippets. For functions, because similar to that we cannot have functions inside functions in C++, we cannot put functions in scope defined by {...}. Fortunately, we can still use method #1 for functions by creating namespaces for each scope. Or simply, use method #2.