[Solved] How can you rewrite this code using the new C# 8.0 using declaration syntax to simplify resource cleanup?using (var conn = new SqlConnection(connString)) { conn.Open(); // use connection } | C Sharp (C#)

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How can you rewrite this code using the new C# 8.0 using declaration syntax to simplify resource cleanup?

using (var conn = new SqlConnection(connString)) {
    conn.Open();
    // use connection
}

Ausing (conn = new SqlConnection(connString)) { conn.Open(); // use connection }

Bvar conn = new SqlConnection(connString); using conn.Open(); // use connection

Cvar conn = new SqlConnection(connString); conn.Open(); // use connection conn.Dispose();

Dusing var conn = new SqlConnection(connString); conn.Open(); // use connection

Step-by-Step Solution

Solution:

Step 1: Understand using declaration syntax
Using declaration declares the resource with using var and disposes it at scope end without braces.
Step 2: Identify correct syntax
using var conn = new SqlConnection(connString); conn.Open(); // use connection uses using var correctly, others misuse using or require manual Dispose.
Final Answer:
using var conn = new SqlConnection(connString); conn.Open(); -> Option D
Quick Check:
using declaration simplifies disposal = C [OK]

Quick Trick: using var declares and disposes resource at scope end [OK]

Common Mistakes:

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How can you rewrite this code using the new C# 8.0 using declaration syntax to simplify resource cleanup?