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ASP.NET > Learn ASP.NET > What is difference between "throw" and "throw ex" in...
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What is difference between "throw" and "throw ex" in .Net?

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Yes, there is a difference; 1) throw ex resets the stack trace (so your errors would appear to originate from HandleException) 2) throw doesn't - the original offender would be preserved.
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Expert Microsoft Technology Trainer (SharePoint, Dot Net, MSBI, SQL Server)

In Throw, the original exception stack trace will be retained. To keep the original stack trace information, the correct syntax is 'throw' without specifying an exception. In Throw ex, the original stack trace information will get override and you will lose the original exception stack trace. I.e....
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In Throw, the original exception stack trace will be retained. To keep the original stack trace information, the correct syntax is 'throw' without specifying an exception. In Throw ex, the original stack trace information will get override and you will lose the original exception stack trace. I.e. 'throw ex' resets the stack trace read less
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IT Professional Trainer with above 15 years of experience into software IT training

Using Throw statement you can either throw a system exception or your own custom exception
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1.In Throw, the original exception stack trace will be retained. To keep the original stack trace information, the correct syntax is 'throw' without specifying an exception. 2. In Throw ex, the original stack trace information will get override and you will lose the original exception stack trace....
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1.In Throw, the original exception stack trace will be retained. To keep the original stack trace information, the correct syntax is 'throw' without specifying an exception. 2. In Throw ex, the original stack trace information will get override and you will lose the original exception stack trace. I.e. 'throw ex' resets the stack trace read less
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Qa mentor | sdet | istqb® | csm® | sfc™ | perfecto automation certified | recommended on urbanpro

In Throw, the original exception stack trace will be retained. To keep the original stack trace information, the correct syntax is 'throw' without specifying an exception. Declaration of throw try { // do some operation that can fail } catch (Exception ex) { // do some local cleanup throw; } Throw...
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In Throw, the original exception stack trace will be retained. To keep the original stack trace information, the correct syntax is 'throw' without specifying an exception. Declaration of throw try { // do some operation that can fail } catch (Exception ex) { // do some local cleanup throw; } Throw ex In Throw ex, the original stack trace information will get override and you will lose the original exception stack trace. I.e. 'throw ex' resets the stack trace. Declaration of throw ex try { // do some operation that can fail } catch (Exception ex) { // do some local cleanup throw ex; } } read less
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In Throw, the original exception stack trace will be retained. To keep the original stack trace information, the correct syntax is 'throw' without specifying an exception. In Throw ex, the original stack trace information will get override and you will lose the original exception stack trace. I.e....
read more
In Throw, the original exception stack trace will be retained. To keep the original stack trace information, the correct syntax is 'throw' without specifying an exception. In Throw ex, the original stack trace information will get override and you will lose the original exception stack trace. I.e. 'throw ex' resets the stack trace. - See more at: read less
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Have 9+ years in teaching with 5 + years software development industries exp

throw re-throws the exception that was caught, and preserves the stack trace. throw ex throws the same exception, but resets the stack trace to that method.
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7 yrs Experience along with Microsoft Certified Technology Specialist Trainer for .Net with C# as Language

throw re-throws the exception that was caught, and preserves the stack trace. throw ex throws the same exception, but resets the stack trace to that method. I hope you will remember the difference ..
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B.Tech(C.S.)

If you use "throw" statement, it preserve original error stack information. If you use "throw ex" statement, stack trace of the exception will be replaced with a stack trace starting at the re-throw point.
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Programming Faculty

In Throw, the original exception stack trace will be retained. To keep the original stack trace information, the correct syntax is 'throw' without specifying an exception. In Throw ex, the original stack trace information will get override and you will lose the original exception stack trace. I.e. 'throw...
read more
In Throw, the original exception stack trace will be retained. To keep the original stack trace information, the correct syntax is 'throw' without specifying an exception. In Throw ex, the original stack trace information will get override and you will lose the original exception stack trace. I.e. 'throw ex' resets the stack trace. read less
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