C# Type Parameters

Description

Type parameters can be introduced in the declaration of classes, structs, interfaces, delegates, and methods.

class List<TValue> {}

Other constructs, such as properties, cannot introduce a type parameter, but can use one. For example, the property Value uses T:

public struct Nullable<T>
{
   public T Value { get; set; }
}

A generic type or method can have multiple parameters. For example:

class Dictionary<TKey, TValue> {}

To instantiate:

Dictionary<int,string> myDic = new Dictionary<int,string>();

Or:

var myDic = new Dictionary<int,string>();

Generic type names and method names can be overloaded as long as the number of type parameters is different.

For example, the following two type names do not conflict:

class A<T> {}
class A<T1,T2> {}

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What you will learn in the next chapter:

1. A list of preprocessor commands available in C#
2. All C# Preprosessor directives
3. Example for Preprocessor directives

C# Type Parameters