C#.NET — choose the valid ways to convert a Single (float) to a String.

Introduction / Context:Converting numeric types to strings is routine in C#.NET. The question presents several code snippets and asks which are valid for converting a Single (alias float) into a String.

Given Data / Assumptions:

• Single f = 9.8f; then assign a string variable s.
• Snippets may include syntax from other languages or invalid casts.

Concept / Approach:In C#, use Convert.ToString or the instance ToString() method. Direct casting from float to string is illegal, and VB-specific functions like CString or Clnt do not exist in C#.

Step-by-Step Solution:

Verification / Alternative check:Try formatting: f.ToString("F2") for 2 decimal places, demonstrating rich formatting support.

Why Other Options Are Wrong:They are either syntactically invalid in C# or rely on non-existent conversion helpers.

Common Pitfalls:Assuming a C-style cast will work for disparate types like float to string.

Final Answer:s = Convert.ToString(f); (also acceptable: s = f.ToString();)