General Structure of a C# Program
C# programs consist of one or more files. Each file contains zero or more namespaces. A namespace contains types such as classes, structs, interfaces, enumerations, and delegates, or other namespaces. The following example is the skeleton of a C# program that contains all of these elements.
// A skeleton of a C# program
using System;
// Your program starts here:
Console.WriteLine("Hello world!");
namespace YourNamespace
{
class YourClass
{
}
struct YourStruct
{
}
interface IYourInterface
{
}
delegate int YourDelegate();
enum YourEnum
{
}
namespace YourNestedNamespace
{
struct YourStruct
{
}
}
}
The preceding example uses top-level statements for the program's entry point. You can also create a static method named Main
as the program's entry point, as shown in the following example:
// A skeleton of a C# program
using System;
namespace YourNamespace
{
class YourClass
{
}
struct YourStruct
{
}
interface IYourInterface
{
}
delegate int YourDelegate();
enum YourEnum
{
}
namespace YourNestedNamespace
{
struct YourStruct
{
}
}
class Program
{
static void Main(string[] args)
{
//Your program starts here...
Console.WriteLine("Hello world!");
}
}
}
Related Sections
You learn about these program elements in the types section of the fundamentals guide:
C# Language Specification
For more information, see Basic concepts in the C# Language Specification. The language specification is the definitive source for C# syntax and usage.
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