C# - Null Checking with "is null"

In C#, use the "is null" check to verify null values.

Syntax (C# 9.0+):

if (obj is null) {
// Handle null case
}

Older syntax:

if (obj == null) {
// Handle null case
}

The "is null" pattern is more idiomatic in modern C#.

Example:

string name = GetName();
if (name is not null) {
Console.WriteLine(name);
}

Benefits:

• More readable than == null
• Aligns with other pattern matching features
• Potential for future optimizations