partial types are defined using the keyword “partial”.
Further the “partial” keyword should precede the type signature definition.
Note that the partial keyword applies to classes structs and interfaces but not enums.
It also does not apply to classes that extend the system classes or types.
“It is possible to split the definition of a class or a struct
or an interface over two or more source files




public partial class Employee

{

public void ReadData()

{

//Some code

}

}

Employee2.cs

public partial class Employee

{

public void SaveData()

{

//Some code

}

}

class Test

{

public static void Main(string[] args)

{

Employee employee new Employee();

//Some Code

employee.ReadData();

//Some code

employee.SaveData();

}

}