Hi Aditya In MVC t4 stands for ( Text Template Transformation Toolkit ). We use this template to generate the code when we add a view or controller in MVC. The file extension of this template is tt. Basically when we add a view or controller using a scaffhold template it is called a T4 template. By using this template if we add a controller or view then it generates some code automatically. For detail take the reference of this article What a T4 Template is in MVC