Fix ASP.NET Core

[artem-kurchenko]

• Remove old structure
• Add a project from a template

[DevExpressExampleBot]

Please correct the project and update this pull request by pushing a new commit.

[BUILDING ERROR]
	OUTPUT: C:\Temp\47a873c3-cba2-4905-9096-3adcf1b75bc5\tempTestingCS\ASP.NET Core\ASP.NET Core.csproj(8,5): warning MSB3073: The command "node --version" exited with code 9009.
C:\Temp\47a873c3-cba2-4905-9096-3adcf1b75bc5\tempTestingCS\ASP.NET Core\ASP.NET Core.csproj(11,5): error : Node.js is required to build and run this project. To continue, please install Node.js from https://nodejs.org/, and then restart your command prompt or IDE.

https://codecentralfarm.devexpress.devx/job/devextreme-cascading-selectboxes_25.1.3+/3/console