In Visual Studio I can type e.g.
for TAB TAB
and a code snippet pops in.
Are there built-in code
You can download the method snippets as a Visual Studio Extension.
It supports the following:
method (typical method)
vmethod (virtual method)
smethod (static method)
xmethod (extension method)
In Visual Studio, go to menu Tools → Extensions and Updates...
Observe the Extensions and Updates window
Enter "C# Methods Code Snippets" in the search field (upper right)