I am programming in Windows Form and MySQL.

If I declare

in the program,

I can use the connection and command objects in the whole .cs page.

But if I write the code below,

connection and command objects are declared twice. I think one object declaration is the best way. Do more object declarations affect the program?

I am programming in Windows Forms and MySQL.

If I declare this in the program, I can use the connection and command objects in the whole .cs page:

But if I write the code below, connection and command objects are declared twice:

I think one object declaration is the best way. Do more object declarations affect the program?

I am doing program in win-form and MySQL.

I can use the connection and command objects to the whole .cs page.

But if I write below type of code,

connection and command objects are twice declaring. I think one object declaration is the best way. Is more objects declaration affect the program?. Please Clear me.

I am programming in Windows Form and MySQL.

I can use the connection and command objects in the whole .cs page.

But if I write the code below,

connection and command objects are declared twice. I think one object declaration is the best way. Do more object declarations affect the program?