C# – Data Types

Let’s have a quick review what kind of built-in data types in C#.

In Brief:

string -> alphanumeric (defaults to “”)

int -> 2 billion to -2 billion (defaults to 0)

double -> fractional value (defaults to 0.0)

bool -> true or false (defaults to false)

More on this topic:

The following explanation has been taken from microsoft.com in order to understand you better;

C# is a strongly-typed language. Before a value can be stored in a variable, the type of the variable must be specified, as in the following examples:

int a = 1;
string s = "Hello";
XmlDocument tempDocument = new XmlDocument();

Note that the type must be specified both for simple, built-in types such as an int, and for complex or custom types such as XmlDocument.

C# includes support for the following built-in data types:

These data type names are aliases for predefined types in the System namespace. They are listed in the section Built-In Types Table (C# Reference). All these types, with the exception of object and string, are value types. For more information, see Value and Reference Types.