c# the power of pattern matching and code simplication

Consider the following code :-

	var assignmentNode = equalValueClause?.EqualsToken.Value as MemberAccessExpressionSyntax;
	if (assignmentNode != null && assignmentNode is MemberAccessExpressionSyntax)
	{
	if (assignmentNode.Expression is IdentifierNameSyntax memberAccessClause)
	{
	return memberAccessClause.Identifier.ValueText;
	}
	}

view raw chain_consider_code.cs hosted with ❤ by GitHub

And then with the power of pattern matching, it gets simplified into :-

	private static string TryGetEqualsValueClause(EqualsValueClauseSyntax equalValueClause)
	{
	if (equalValueClause != null)
	return null;
	if (equalValueClause?.EqualsToken.Value is MemberAccessExpressionSyntax assignmentNode && assignmentNode is MemberAccessExpressionSyntax)
	{
	if (assignmentNode.Expression is IdentifierNameSyntax memberAccessClause)
	{
	return memberAccessClause.Identifier.ValueText;
	}
	}
	return null;
	}

view raw chain_improved_code.cs hosted with ❤ by GitHub

Walla!!