C#.NET properties — Sample has a Length property with only a get accessor (read-only). Which statements are valid?

Introduction / Context:
A read-only property exposes only a getter. This permits reading the value but forbids assignment. Many .NET APIs use read-only properties for computed or immutable values.

Given Data / Assumptions:

• Sample.Length has a get accessor and no set accessor.
• Length is an instance property unless otherwise specified.

Concept / Approach:
With only a getter, you can read the property into a local variable or print it using the instance. You cannot assign to it, nor can you use type-qualified syntax like Sample.Length unless the property is static. Therefore, the only correct option is to construct an instance and read the property value.

Step-by-Step Solution:

Verification / Alternative check:
Define public int Length { get { return _len; } } and compile. A and B produce compile-time errors, while C compiles.

Why Other Options Are Wrong:

• A/B: Attempt to write to a read-only property.
• D/E: Use type-qualified access without a static property.

Common Pitfalls:
Confusing static and instance members; always access instance properties through an instance unless explicitly static.

Final Answer:
Sample m = new Sample(); int l; l = m.Length;