Rename Solutions and Project Items
Applies to: 
SQL Server
Azure SQL Database
Azure SQL Managed Instance
Azure Synapse Analytics
Analytics Platform System (PDW)
You can rename a solution and its project items in Solution Explorer.
Note
Projects and connections cannot be renamed.
To rename a solution or item
In Solution Explorer, select the solution or the project item that you want to rename.
On the View menu, click Properties Window.
In the Properties window, edit the (Name) property.