Tips for writing beautiful C # code,

Tips for writing beautiful C # code,

I wrote my blog for the first time, but I don't know how to edit the code. Now, haha ....

I don't like reading blogs that copy and paste a bunch of code at will. So, let's use some simple examples to help you...

1. Automatic attributes.

1. Enter prop under vs and the Tab key will appear.

2. With Automatic attributes, we no longer need to define a private field for each public attribute of a class (actually not very useful ),

However, through reflection, we can still see the corresponding private field.

Example:

　　　

Ii. initialize the device.

If a list object is created and some elements need to be added.

1. The general practice is:

　　　

2. Use the initialization tool:

　　　

Iii. Double question mark and three-object operator.

If list is null, a new object is created.

1. The general practice is:

2. Use double question marks:

3. Use the Three-object OPERATOR:

4. Use the lamda expression.

When you need to calculate the number of Two Methods

1. The general practice is:

　 　

2. Use the lamda expression:

　 　

If 3 + 5 is required, you can directly call temp (3, 5). The returned result is 8.

 

Note: Func <int, int, int> is defined by the system with two parameters. The generic delegation of a returned value is defined as follows:

　　

5. Use Linq.

If you want to filter out the elements whose ItemCode is "hello ",

1. General Practice:

　　

2. Use Linq

　　

Note: 1. Where is an extension method (defined by the this keyword). It is a function defined by the system and is defined as follows:

A. the first parameter source corresponds to the list above,

B. The second parameter predicate (the parameter type is Tsource, And the return type is bool ),

Corresponding lamda expression (o => o. ItemCode = "hello ")