About silverlight

Question

What is the best coding language for silverlight?
C# or XAML

Mahesh Chand · Answer

Yes, as Sam said, you MUST use both. XAML is for the UI and C# is the code behind.

Sam Hobbs · Answer

In other words, you must use both XAML and another language such as C# or VB.

Jaganathan Bantheswaran · Answer

Hi,
If you need to design a page then you should use XAML.
for example:
If you need to do something on clicking the created button then you have to use C# [ in your case ].
for example:
private void OnButtonClick(object sender, RoutedEventArgs e)
{
BindNamesToListBox();
}
So both XAML and C# are important.
To learn about Silverlight start with -  Silverlight Introduction

Sandeep Shekhawat · Answer

XAML is a declarative markup language.
XAML simplifies creating a UI for a .NET Framework application. You can create visible UI elements in the declarative XAML markup, and then separate the UI definition from the run-time logic by using code-behind files.
C# is programming language
c#   is intended for use in developing software/web component.