Quick Answer

Handle invalid type conversions.

Understanding the Issue

Occurs when assigning incompatible types without explicit conversion. C# requires explicit casts for narrowing conversions.

The Problem

This code demonstrates the issue:

Csharp Error 
double d = 3.14;
int i = d; // Error

The Solution

Here's the corrected code:

Csharp Fixed 
// Solution 1: Explicit cast
int i = (int)d; // Truncates

// Solution 2: Use Convert
int safe = Convert.ToInt32(d); // Rounds

// Solution 3: TryParse for strings
if (int.TryParse("123", out int result)) {
    // Use result
}

// Solution 4: Implement conversion
public static explicit operator TargetType(SourceType s) {
    // Conversion logic
}

Key Takeaways

Use proper conversions between incompatible types.