what is the need of using interface in program ex:if we have a program like this interface1() { void method1(); void method(); } class a1 : interface1 { a1 b = new b(); b.method1(); b.method2(); } so without using interface also we can achieve this then wat is the need to use the interface? plz give me the answer

1 Answers  

---

how to retrive a TextBox value in to Sql database using C# windows form application coding

3 Answers  

---

Why do we use readonly in c#?

0 Answers  

---

What if an error occurs in Catch block, how can you prevent it?

2 Answers   IBM,

---

Can a struct inherit from an interface in c#?

0 Answers  

---

What is difference between value and reference types ?

4 Answers   Accenture,

---

What is for loop in c#?

0 Answers  

---

What?s the advantage of using System.Text.StringBuilder over System.String?

1 Answers  

---

what is the main differnce between const,readonly and static

3 Answers   Beehive Systems, CDAC,

---

What is the default value of guid in c#?

0 Answers  

---

What are the access modifiers in c#?

0 Answers  

---

Why multiple Inheritence is not used in C#?

8 Answers   Symphony,

---