Relating C# Keywords to .NET Types
Learn about the C# type keywords, which are aliases for corresponding .NET types.
One of the common questions is, “What is the difference between a string with a lowercase s and a String with an uppercase S?”
The short answer is easy: none. The long answer is that all C# type keywords, like string or int are aliases for a .NET type in a class library assembly.
Mapping the keyword to type
When we use the string keyword, the compiler recognizes it as a System.String type. When we use the int keyword, the compiler recognizes it as a System.Int32 type. Let’s see this in action with some code:
Step 1: In Program.cs, declare two variables to hold string values, one using lowercase string and one using uppercase String, as shown in the following code:
string s1 = "Hello";String s2 = "World";WriteLine($"{s1} {s2}");
Step 2: Run the code, and note ...