To pass the string variable value from C# to another form to another form

It's not a best practice, but it's possible with a stain.

Form 1 and Form 2

To the form cs file that you want to hand over the variable

public static string name;

It's defined in this way. For example, suppose you define Form 2 like that

Next, when you give the data,

Form2.name = "data";

You can give it like this.