protected ConditionalExpression MakeSureBlockStartsWith(ParameterExpression jsonReaderParam, char c)
{
return(Expression.IfThen(
Expression.NotEqual(
Expression.Call(jsonReaderParam, ExpressionReflector.GetMethodInfo <JsonReader>(r => r.CurrentChar())),
Expression.Constant(c)),
Expression.Throw(
Expression.New(
ExpressionReflector.GetConstructorInfo(() => new JsonReadException(null, null)),
Expression.Constant($"Input is not a valid Json: '{c}' expected."),
Expression.Default(typeof(Exception))))));
}