What is the difference between String and string in C#?

In C#, string is an alias for System.String, and there is no functional difference between the two. Both string and String refer to the same .NET Framework class System.String, which represents a sequence of characters.

Here are some key points about string and String in C#:

1. Case Sensitivity:

   • C# is case-sensitive, but both string and String are treated the same because string is simply an alias for System.String. Therefore, you can use either string or String interchangeably.

2. Convention:

   • The use of string is a convention that is widely followed in C# programming, likely because it aligns with other primitive data types like int, double, etc. and is easier to write and read.

3. Consistency:

   • Using string helps maintain consistency in codebases, as it's a convention that most C# developers are familiar with.

4. Clarity:

   • While both string and String refer to the same class, using string can enhance clarity and readability, especially for developers who are accustomed to the convention.

In summary, there is no functional difference between string and String in C#. They both refer to the same class System.String and can be used interchangeably. However, using string is a common convention in C# programming and helps maintain consistency and clarity in codebases.