// public static methods
/// <summary>
/// Finds the first parameter in an expression.
/// </summary>
/// <param name="node">The expression containing the parameter that should be found.</param>
/// <returns>The first parameter found in the expression (or null if none was found).</returns>
public static ParameterExpression FindParameter(Expression node)
{
var finder = new ExpressionParameterFinder();
finder.Visit(node);
return(finder._parameter);
}
// public static methods
/// <summary>
/// Finds the first parameter in an expression.
/// </summary>
/// <param name="node">The expression containing the parameter that should be found.</param>
/// <returns>The first parameter found in the expression (or null if none was found).</returns>
public static ParameterExpression FindParameter(Expression node)
{
var finder = new ExpressionParameterFinder();
finder.Visit(node);
return finder._parameter;
}