What is an HttpCombiner?

An HTTP handler that combines multiple CSS, Javascript or URL into one response for faster page load. It can combine, compress and cache response which results in faster page
load and better scalability of web application.

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Daily Tips- Tip #41 -How will you test memory leak in a .NET application?

using Perfmon.exe application.

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What is the css equivalent for the NOBR tag?

the space character  

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What is the best practice for calling explicit garbage collections?

You should call the finalizer after gc like,

//c#
GC.Collect();
GC.WaitForPendingFinalizers();

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Which one is a best practice to use DirectCast or CType?

DirectCast

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Which is the best practice in applying multiple attributes to a same member?

Instead of applying it as comma seperated, apply individually in separate lines,
//c#
[Conditional("TRACE")]
[DebuggerStepThrough]
void MyMethod()
{
}

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Daily Tips- Tip #44 - How will you mark a method as obsolete?

//c#
[Obsolete("Call NewMethod instead")]
void OldMethod()
{

}

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