Final local variables in C#

To make a local variable final, use the read-only keyword in C# because it is not possible to implement the final keyword.

The read-only keyword allows a variable to be assigned only once. Fields marked "read-only" can only be set once during object construction and cannot be changed.

Let's look at an example. Below, we set the empCount field to be read-only and cannot be changed once assigned.

Example

class Department {
   readonly int empCount;

   Employee(int empCount) {
      this. empCount = empCount;
   }

   void ChangeCount() {
      //empCount = 150; // Compile error
   }
}

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