// ref - must be initialized before passing
public void RefMethod(ref int value)
{
    value = value * 2;
}

// out - must be assigned in method
public void OutMethod(out int result)
{
    result = 42;
}

// in - read-only reference
public void InMethod(in LargeStruct data)
{
    // Can read but not modify
}

// Optional parameters with default values
public void OptionalMethod(
    string required,
    int optional1 = 10,
    bool optional2 = true)
{
    // Can be called with 1, 2, or 3 arguments
}

// Variable number of arguments
public void ParamsMethod(params int[] values)
{
    foreach (var value in values)
    {
        // Process each value
    }
}

// Usage:
// ParamsMethod(1);
// ParamsMethod(1, 2, 3);
// ParamsMethod(new[] { 1, 2, 3, 4, 5 });

// Method with multiple parameters
public void Configure(
    string name,
    int timeout,
    bool enabled)
{
}

// Can be called with named arguments
// Configure(timeout: 30, enabled: true, name: "Test");