What does strongly typed means in .NET framework?

Question

This morning was going through a book where I found a paragraph as stated below :

Each data field in a table is a strongly typed data member, fully compliant with .NET’s Common Type System.

Does the above lines means " that objects written in different languages can interact with each other like "

And if it means the above lines what does exactly the above line means by saying different languages can interact with each other like

I am trying to work out with an example but no success till now.

Or is it something that i am missing and need to know. Please help me to understand.

Thanks in advance

Answer 1

For e.g you cannot Multiply or Divide two different types i.e String vs Integer

var answer = 1 * "1"; // you cannot do this 

You have to explicity cast it, this is known as strongly typed

where as if you see in php

$x = "3" * 1; // is correct in php 

So here you dont need to explicitly cast it.

Answer 2

When we say something is strongly typed we mean that the type of the object is known and available.

Let say I have a function like following

public int Add(int a, int b){  return a+b; } 

We can call this function like

int result = Add(5,4); 

But we can not do like following

int result = Add(5.2,4.5); // We will get here compilation error. 

C# (and C++ and many other languages) is strongly typed because the compiler will detect and flag these errors at compilation time.

See here