Question - What are partial classes in C#? 
          
        
        Answer - 
        
Partial classes implement the functionality of a single class into multiple files. These multiple files are combined into one during compile time. The partial class can be created using the partial keyword. 
public partial Clas_name  
{
       // code
}
You can easily split the functionalities of methods, interfaces, or structures into multiple files. You can even add nested partial classes.