C#: Is there any Difference between (Type)Something vs Something as Type [duplicate]

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Possible Duplicate:

Direct casting vs 'as' operator?

Casting vs. using the as keyword in the CLR

In C#, whats the difference

var obj = (Array)Something

vs

var obj = Something as Array

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first will throw a CastException if invalid. The second will only result in obj = null instead.

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As well as Danijels answers

The first can be used with any type.

The as operator can only be used on reference types.

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var obj = (Array)Something 

will throw an InvalidCastExcpetion if Something not derived from System.Array or does not have a conversion operator for System.Array. This can be used with value types and reference types.

var obj = Something as Array

will return null (obj will be null) if Something not derived from System.Array or does not have a conversion operator for System.Array. This can be used only with reference types. You'd need to box you value type first.