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Can overridden methods differ in return type?

...is return-type-substitutable for another method d2 with return type R2, if and only if the following conditions hold: If R1 is void then R2 is void. If R1 is a primitive type, then R2 is identical to R1. If R1 is a reference type then: R1 is either a subtype of R2 or R1 can be co...
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What is the difference between String.Empty and “” (empty string)?

In .NET, what is the difference between String.Empty and "" , and are they interchangable, or is there some underlying reference or Localization issues around equality that String.Empty will ensure are not a problem? ...
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Overwrite or override

It might seem to be a stupid question but I'm just so curious and want to use the correct term when talking about the issue. Couldn't find a similar question here so I decided to create a new one. ...
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Executing a command stored in a variable from PowerShell

I have a command that I have build and stored in a variable in PowerShell. This command works if I do a Write-Host and copy and paste into a standard cmd.exe window. ...
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What is sr-only in Bootstrap 3?

... @Christophe I would still recommend that article for understanding the concept. Even though it doesn't explain the problems with rtl content it does list different techniques which also includes clipping – katranci Jan 20 '14 at 12:02 ...
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facebook: permanent Page Access Token?

...ret}&fb_exchange_token={short_lived_token} entering in your app's ID and secret and the short-lived token generated in the previous step. You cannot use the Graph API Explorer. For some reason it gets stuck on this request. I think it's because the response isn't JSON, but a query string. Sin...
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The conversion of a datetime2 data type to a datetime data type resulted in an out-of-range value

...bject that has only been populated with data in the form (headline, story, and image). ApplyPropertyChanges applies changes to all properties of the object, including your uninitialized DateTime, which is set to 0001-01-01, which is outside of the range of SQL Server's DATETIME. Rather than using ...
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A dependent property in a ReferentialConstraint is mapped to a store-generated column

...t you defined a bad column relation between your tables? different columns and one was set as autonumeric. It happened to me. share | improve this answer | follow ...
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Most efficient way to make the first character of a String lower case?

... are operations per second, the more the better. Tests test1 was first Andy's and Hllink's approach: string = Character.toLowerCase(string.charAt(0)) + string.substring(1); test2 was second Andy's approach. It is also Introspector.decapitalize() suggested by Daniel, but without two if statemen...
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VS 2012: Scroll Solution Explorer to current file

... Yes, you can find that under Tools - > Options - > Projects and Solutions - > Track Active Item in Solution Explorer It's off by default (as you've noticed), but once it's on, Solution Explorer will expand folders and highlight the current document as you switch between files. ...