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Difference between String.Empty and ""
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Posted Date :
January 19, 2009
The main difference is lies on memory management.
String.Empty will not create any object of string where as "" (Double Quote or Empty Quote) will create a new object in the memory for the checking the objects.
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Difference between String.Empty and ""
difference between string and StringBuilder?
String is immutable & StringBuilder is mutable.
Means we can add, remove or append the words in stringbuilder but not in string. And stringbuilder have larger range of storing than string.
What is Difference Between ToString() vs Convert.ToString() vs (string) cast
There is a simple but important difference between these three.
ToString() raise exception when the object is null
So in the case of object.ToString(), if object is null, it raise NullReferenceException.
Convert.ToString() return string.Empty in case of null object
(string) cast assign the object in case of null
So in case of
MyObject o = (string)NullObject;
But when you use o to access any property, it will raise NullReferenceException.
Difference between System.String and System.StringBuilder classes?
-- System.String is immutable; System.StringBuilder can have mutable string where a variety of operations can be performed.
What is the difference between string and stringbuilder?
Objects of type stringBuilder are mutable, whereas objects of string are immutable
What is the difference between String and StringBuilder?
When we use string object ot concatenate two strings , the first string is concatenate to the other string by creating a new copy in the memory as string object , and the old string is deleted , this process is very long so we say strings are immutable.SO we use string builder object where append method is used.
Stringbuilder is faster than string operation as copy is done at the same loication
In C# what is the difference between String and string
they are same
Difference between String vs StringBuilder?
Once the string object is created, its length and content cannot be modified.
Even after object is created, it can be able to modify length and content.
Difference between String vs string?
1.String is a class(System.String)
2.String is a Reference type(class)
1.string is an alias name of String class that is created by microsoft
2.string is an value type(data type)
3.string is a C# keyword
4.string is a compiler shortcut for System.String class
What is difference between System.String and System.StringBuilder classes?
String and StringBuilder classes are used to store string values but the difference in them is that String is immutable (read only) by nature, because a value once assigned to a String object cannot be changed after its creation. When the value in the String object is modified, a new object is created, in memory, with a new value assigned to the String object. On the other hand, the StringBuilder class is mutable, as it occupies the same space even if you change the value. The StringBuilder class is more efficient where you have to perform a large amount of string manipulation.
What is the difference between convert.to.string and .to.string() method?
Convert function handles nulls while i.string() does not it will throw a null reference exception error.
Difference Between Delete and Truncate
.Delete table is a logged operation, so the deletion of each row gets logged in the transaction log, which makes it slow.
. Truncate table also deletes all the rows in a table, but it won't log the deletion of each row, instead it logs the de-allocation of the data pages of the table, which makes it faster. Of course, truncate table cannot be rolled back.
. Truncate table is functionally identical to delete statement with no "where clause" both remove all rows in the table. But truncate table is faster and uses fewer system and transaction log resources than delete.
. Truncate table removes all rows from a table, but the table structure and its columns, constraints, indexes etc., remains as it is.
. In truncate table the counter used by an identity column for new rows is reset to the seed for the column.
. If you want to retain the identity counter, use delete statement instead.
. If you want to remove table definition and its data, use the drop table statement.
. You cannot use truncate table on a table referenced by a foreign key constraint; instead, use delete statement without a where clause. Because truncate table is not logged, it cannot activate a trigger.
. Truncate table may not be used on tables participating in an indexed view.
Difference between assembly manifest & metadata?
assembly manifest - An integral part of every assembly that renders the assembly self-describing. The assembly manifest contains the assembly's metadata. The manifest establishes the assembly identity, specifies the files that make up the assembly implementation, specifies the types and resources that make up the assembly, itemizes the compile-time dependencies on other assemblies, and specifies the set of permissions required for the assembly to run properly. This information is used at run time to resolve references, enforce version binding policy, and validate the integrity of loaded assemblies. The self-describing nature of assemblies also helps makes zero-impact install and XCOPY deployment feasible.
metadata - Information that describes every element managed by the common language runtime: an assembly, loadable file, type, method, and so on. This can include information required for debugging and garbage collection, as well as security attributes, marshaling data, extended class and member definitions, version binding, and other information required by the runtime.
What is the difference between ref & out parameters?
An argument passed to a ref parameter must first be initialized. Compare this to an out parameter, whose argument does not have to be explicitly initialized before being passed to an out parameter.
What is the difference between a Struct and a Class?
The struct type is suitable for representing lightweight objects such as Point, Rectangle, and Color. Although it is possible to represent a point as a class, a struct is more efficient in some scenarios. For example, if you declare an array of 1000 Point objects, you will allocate additional memory for referencing each object. In this case, the struct is less expensive.
When you create a struct object using the new operator, it gets created and the appropriate constructor is called. Unlike classes, structs can be instantiated without using the new operator. If you do not use new, the fields will remain unassigned and the object cannot be used until all of the fields are initialized.
It is an error to declare a default (parameterless) constructor for a struct. A default constructor is always provided to initialize the struct members to their default values.
It is an error to initialize an instance field in a struct.
There is no inheritance for structs as there is for classes. A struct cannot inherit from another struct or class, and it cannot be the base of a class. Structs, however, inherit from the base class Object. A struct can implement interfaces, and it does that exactly as classes do.
A struct is a value type, while a class is a reference type.
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