1- http://www.c-sharpcorner.com/UploadFile/myoussef /CSharpMethodsP211142005232706PM/CSharpMethodsP2.aspx

2- http://en.csharp-online.net/Interfac...stract_Classes

3- char ch1= 'a' ;
// need more explanation from u in third question

Your first question are actually 3 questions. Just give us a break, please! What if I would ask you: Tell me something about hydrogen, helium, lithium, beryllium, boron, carbon...(I can go on you know)
Please use a simple question about the problem you have.
So we can formulate an answer in a way you will understand the most.

Hi,
i think you are using C# so you want the difference betwen Void Static & return ok i will explain u one by one
all u have been is askedin ur 1st question is related to function i.e.

void--> it is using in function to define function type means if u want ur function doesn't return anything then you have to define "void function functionname" this type of function not return anything

Static --> as C# is in object oriented lang. so it always need an object but if function is define like "static function" then there is no need for object required.

return-->return is return type of function means ur fun return anything then which kind kind of data is returned like integer,charater etc.....

i hope this will help you to understand